{"title":"Optolong","description":"","products":[{"product_id":"optolong-filtro-clear-sky-filter-77mm","title":"Optolong Clear Sky Filter 77mm","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.7; color: #333;\"\u003e\n\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003e\n\nOptolong Clear Sky Filter 77mm\n\n\u003c\/h1\u003e\n\n\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003e\nThe \u003cstrong\u003eOptolong Clear Sky Filter 77mm\u003c\/strong\u003e is an \u003cstrong\u003eastronomical filter\u003c\/strong\u003e designed to improve contrast, manage bandwidth, or provide optical protection, depending on the type indicated in the title.\n\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eBandwidth management\u003c\/h2\u003e\n\n\u003cp\u003e\nDesigned to enhance the useful signal or protect the optical train, depending on the filter type.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eBetter contrast\u003c\/li\u003e\n\n\u003cli\u003eDedicated use\u003c\/li\u003e\n\n\u003cli\u003eUseful accessory\u003c\/li\u003e\n\n\u003cli\u003eMore effective setup\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePractical compatibility\u003c\/h2\u003e\n\n\u003cp\u003e\nSuitable for setups and accessories of the size indicated in the title.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eSimple mounting\u003c\/li\u003e\n\n\u003cli\u003eGood integration\u003c\/li\u003e\n\n\u003cli\u003ePracticality\u003c\/li\u003e\n\n\u003cli\u003eTargeted use\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eApplications\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eAstrophotography\u003c\/li\u003e\n\n\u003cli\u003ePlanetary\u003c\/li\u003e\n\n\u003cli\u003eDeep-sky\u003c\/li\u003e\n\n\u003cli\u003eOptical protection\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003ctbody\u003e\n\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eAstronomical filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eSize\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e77 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePackage contents\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eOptolong Clear Sky Filter 77mm\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003e\nTake advantage of free shipping throughout Italy on orders over €199.99!\n\n\u003c\/div\u003e\n\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120763470040,"sku":"67558","price":143.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/3afda2b1e473ffdd0d79f9e727e9e91f.jpg?v=1764071111"},{"product_id":"optolong-filtro-filter-l-enhance-1-25","title":"Optolong L-eNhance Filter 1.25\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-eNhance Filter 1.25\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eThe dual bandpass L-eNhance filter allows you to photograph nebulae with color cameras while significantly reducing light pollution. The H-alpha, H-beta, and O-III spectral lines pass through almost unimpeded. Light pollution areas are blocked, making deep-sky photography possible even from the city! The evocative colors of the nebulae are preserved as much as possible to create a natural impression. The filter allows you to capture images with quality close to that of monochrome cameras with narrowband filters!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eFilter thickness (mm): 2\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multiple\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-eNhance Filter 1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTri-band narrowband filter (Hα, Hβ, OIII)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter thickness (mm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emultiple\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUHC filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120763502808,"sku":"65041","price":156.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/5374afec912904334860d42a37126d70.jpg?v=1764071111"},{"product_id":"optolong-filtro-l-pro-1-25","title":"Optolong L-Pro Filter 1.25''","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-Pro Filter 1.25''\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong Filter This filter is designed to improve the contrast of deep-sky objects and attenuate the brightness of the background sky, thanks to a sophisticated transmission that allows light from the lines where deep-sky objects glow (H-alpha, O-III, N-II, H-Beta, S-II, etc.) to pass through, while blocking harmful light emissions (for example, the Hg line or wavelengths from sodium vapor lighting). It also reduces the background brightness caused by oxygen in the atmosphere (“sky glow”). Use of this filter is recommended in areas with light pollution and is suitable for both visual and photographic use. Compared to other light pollution reduction filters, such as UHC or CLS filters, this is a multi-band pass filter that has minimal impact on color rendition. Therefore, it is suitable for photographing objects that emit continuous light: not only emission nebulae, but also galaxies, star clusters, reflection nebulae, etc. You can achieve exposures up to 3 times longer compared to shots without a filter. Treatment characteristics: The treatments are not cemented onto the optical substrate, but are applied via electron beam evaporation and subsequent Ion-Assisted Deposition (IBAD process). This special process allows for extreme durability and scratch resistance, ensures the stability of the central wavelength (CWL), and prevents thermal drift. Furthermore, it allows for high transmission in the passband and high optical density in the blocked frequency range. Warning: this filter must never be used alone for observing the Sun!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multi-coating\u003c\/li\u003e\n\n\u003cli\u003eFrame: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 95\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 1\/4\u003c\/li\u003e\n\n\u003cli\u003eWidth (mm): 1.85\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-Pro Filter 1.25''\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBroadband Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coating\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e95\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eWidth (mm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.85\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120763896024,"sku":"59433","price":131.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/11031ff7b3090cb6c42b6767f78d3cc1.jpg?v=1764071113"},{"product_id":"optolong-filtro-l-extreme-1-25","title":"Optolong L-eXtreme Filter 1.25\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-eXtreme 1.25\" Filter\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eThe Optolong L-eXtreme is a 7nm dual-bandpass filter that can be used with one-shot color cameras, such as DSLRs (Digital Single-Lens Reflex cameras) and monochrome CCD cameras. It is also suitable for \"fast\" optical systems. The nature of this filter makes it possible to photograph emission nebulae even in skies with heavy light pollution. Optolong believes that the design of the L-eXtreme filter would be a better, competitively priced choice for fast systems.\u003c\/p\u003e \u003cp\u003eThe Optolong L-eXtreme filter isolates the H-Alpha and OIII nebula emission lines, maximizing contrast and the signal-to-noise ratio between nebulae. For people living in areas with significant light pollution or those who want to take photos when the moon is out, the L-eXtreme is an excellent filter. Unlike the L-eNhance filter, which is a tri-band filter (transmitting Hb, Ha, and OIII), the L-eXtreme filter is a dual-band filter that allows the H-Alpha and OIII emission lines to pass through.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey Features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: Multi-coated\u003c\/li\u003e\n\n\u003cli\u003eFrame: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 99\u003c\/li\u003e\n\n\u003cli\u003eConnection (eyepiece side): 1.25\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain Technical Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-eXtreme 1.25\" Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUHC Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMulti-coated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e99\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (eyepiece side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eDual-band narrowband filter (Hα+OIII 7 nm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eEmission nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120763961560,"sku":"67553","price":205.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/2ebaaf27fe0adee7ae75713aee855844.jpg?v=1764071113"},{"product_id":"optolong-filtro-sho-filter-kit-1-25","title":"Optolong SHO Filter Kit 1.25\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong SHO Filter Kit 1.25\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eNarrowband filters increase contrast by letting only a certain range of light wavelengths pass through that correspond to specific spectral lines, for example, hydrogen (H-a, 656nm), oxygen (OIII, 501nm), sulfur (SII, 672nm), etc. The filters can always be used for photography, even when the Moon is visible, or as a light pollution filter in the city. Exposure time duration is not important: you can even take long-exposure photographs. OIII Filter: the narrowband nebula filter lets light pass at 500 nanometers. This is the line of doubly ionized oxygen. Planetary nebulae and supernova remnants shine in this color. H-alpha filter: this narrowband nebula filter lets red light with a wavelength of 656 nanometers pass. It is the line where HII zones (hydrogen nebulae) shine. SII Filter: the narrowband filter lets light from ionized sulfur atoms pass at 672 nanometers. It is the line where many planetary nebulae, emission nebulae, and supernova remnants shine.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eSize: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eOptics coating: multi-coated (plane-parallel)\u003c\/li\u003e\n\n\u003cli\u003eConnection: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 1.25\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong SHO Filter Kit 1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCombinations and sets\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSize\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptics coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated (plane-parallel)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003elinear filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution filter\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eH-alpha\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eGalaxies and star clusters\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120764092632,"sku":"67528","price":433.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/ce6718a61734433f70e430cd5318442a.jpg?v=1764071119"},{"product_id":"optolong-filtro-ubvri-set-photometric-2","title":"Optolong UBVRI photometric filter set 2''","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong UBVRI photometric filter set 2''\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong UBVRI photometric filter set - mounted. This UBVRI photometric filter set consists of five filters in a 1.25\" or 2\" round frame: ultraviolet (U), blue (B), visual (V), red (R), and infrared (I). This set is produced using high-quality branded glass featuring an ion-beam-assisted deposition multi-coating, which ensures extreme scratch resistance and guarantees central wavelength stability. The set is designed for use with filter wheels, with both 1.25\" and 2\" slots. Quality materials: German-made branded glass substrate, 1.85 mm thick. Multi-layer anti-reflective coating, deposited via electron-beam evaporation and ion-beam-assisted deposition. Quality finishes: Substrate with precision optical polishing down to 1\/4 lambda and \u0026lt;30 arcseconds parallelism on both sides. 60\/40 polishing quality according to MIL-O-13830 specifications. Uniform and precise coating method that ensures high passband transmission and precise off-band blocking. Each filter comes with a plastic case with EVA padding. Warning: this filter must never be used alone for observing the Sun! Warning: this filter must never be used alone for observing the Sun!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eMaterial: Schott glass\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multiple\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 70\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 1\/4\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong UBVRI photometric filter set 2''\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emultiple\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e70\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSchott glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eVenus\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observation\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120765370584,"sku":"59438","price":733.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/20923c78f699c890db52285a2fa5a0a3.jpg?v=1764071145"},{"product_id":"optolong-filtro-lrgb-filter-set-1-25","title":"Optolong LRGB Filter Set 1.25\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong LRGB Filter Set 1.25\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eLRGB filter set - Astrophotography with monochrome CCD cameras Four filters for a color image: With the LRGB filter set, you can photograph the sky in color using a monochrome chip. Monochrome astronomical CCD cameras capture deep-sky objects at high resolutions because every pixel on the chip works for the same image.\u003c\/p\u003e \u003cp\u003eWith color CCD chips, resolution is reduced because some pixels are used for the color image. With an LRGB filter set and a monochrome camera, you can use the entire chip for high-resolution shots. L - The luminance filter The luminance filter lets all visible light pass through and blocks the near-UV and IR range. Therefore, the luminance filter captures all the object's details. RGB - each filter has its role The three letters RGB stand for three different colored filters used to obtain color images. The colors we perceive are derived from the three primary colors: Red, Green, and Blue.\u003c\/p\u003e \u003cp\u003eAll the colors we know are generated from these. Our eyes also mix all the colors of our world using internal RGB receptors (or filters). During the image processing phase, the four LRGB channel images are combined. This generates the color image. Tip: For photography with the LRGB filter set, use an Omegon filter wheel to change filters in seconds. The advantages at a glance: LRGB filter set for color images with monochrome CCD cameras Full chip resolution thanks to four different colored filters Durable: scratch-resistant coating Natural colors for deep-sky objects and planets\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and rewarding observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eOptics coating: multi-coated (plane-parallel)\u003c\/li\u003e\n\n\u003cli\u003eManufacturing technique: L-RGB filters\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong LRGB Filter Set 1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptics coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated (plane-parallel)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution reduction\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMoon and planets\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observation\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eEmission nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120765403352,"sku":"67533","price":207.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/1dd55f84ab8bce3c5fb982af475365d1.jpg?v=1764071145"},{"product_id":"optolong-filtro-venus-u-filter-2","title":"Optolong Venus U-Filter 2''","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong Venus U-Filter 2''\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong Venus ultraviolet filter. The Venus U-Filter allows for capturing images (CCD, DSLR, Video) in the ultraviolet spectrum, thereby making the cloud structures in Venus's atmosphere visible. Many cameras are sensitive to wavelengths between 350 and 1100 nm. The filter allows light transmission between approximately 320 and 400 nm (UV). However, your camera must not have a UV\/IR cut filter installed, as otherwise, the light passed by the filter would be blocked beforehand. Additionally, some refractor lenses block UV radiation. Therefore, the ideal telescopes are Newtonians and RCs. The advantages at a glance: Allows for photographing Venus in the UV spectrum. Features multi-layer anti-reflection coating. Precision optical polishing up to 1\/4 lambda on both sides of the substrate. Warning: this filter must never be used alone for solar observation! Warning: this filter must never be used alone for solar observation!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey Features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eMaterial: Schott glass\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multiple\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 80\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 1\/4\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain Technical Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong Venus U-Filter 2''\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eComet Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emultiple\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e80\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSchott glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eComet Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eVenus\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120765534424,"sku":"59436","price":219.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/9ee0badb0bc458eda10c7c4cf7a97de3.jpg?v=1764071147"},{"product_id":"optolong-filtro-sii-filter-2","title":"Optolong SII Filter 2\"","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.7; color: #333;\"\u003e\n\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003e\n\nOptolong SII Filter 2\"\n\n\u003c\/h1\u003e\n\n\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003e\nThe \u003cstrong\u003eOptolong SII Filter 2\"\u003c\/strong\u003e is a \u003cstrong\u003enarrowband filter for astrophotography\u003c\/strong\u003e designed to isolate the S-II line at 672 nm and enhance emission nebulae, planetary nebulae, and supernova remnants.\n\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eBandpass management\u003c\/h2\u003e\n\n\u003cp\u003e\nDesigned to enhance the useful signal or protect the optical train depending on the type of filter.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eBetter contrast\u003c\/li\u003e\n\n\u003cli\u003eDedicated use\u003c\/li\u003e\n\n\u003cli\u003eUseful accessory\u003c\/li\u003e\n\n\u003cli\u003eMore effective setup\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePractical compatibility\u003c\/h2\u003e\n\n\u003cp\u003e\nSuitable for setups and accessories of the format indicated in the title.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eSimple mounting\u003c\/li\u003e\n\n\u003cli\u003eGood integration\u003c\/li\u003e\n\n\u003cli\u003ePracticality\u003c\/li\u003e\n\n\u003cli\u003eTargeted use\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eApplications\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eAstrofotography\u003c\/li\u003e\n\n\u003cli\u003ePlanetary\u003c\/li\u003e\n\n\u003cli\u003eDeep-sky\u003c\/li\u003e\n\n\u003cli\u003eOptical protection\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003ctbody\u003e\n\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eSII narrowband filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFormat\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2 inches\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eWavelength\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e672 nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBandpass\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e3 nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePackage contents\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eOptolong SII Filter 2\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003e\nTake advantage of free shipping throughout Italy for orders over €199.99!\n\n\u003c\/div\u003e\n\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120825467096,"sku":"67555","price":202.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/7c37ebafec609bed5a0ae1bc4e796865.jpg?v=1764072341"},{"product_id":"optolong-filtro-sii-filter-1-25","title":"Optolong SII Filter 1.25\"","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.7; color: #333;\"\u003e\n\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003e\n\nOptolong SII Filter 1.25\"\n\n\u003c\/h1\u003e\n\n\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003e\nThe \u003cstrong\u003eOptolong SII Filter 1.25\"\u003c\/strong\u003e is an \u003cstrong\u003eastronomical filter\u003c\/strong\u003e designed to improve contrast, manage bandwidth, or provide optical protection, depending on the type indicated in the title.\n\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eBandwidth management\u003c\/h2\u003e\n\n\u003cp\u003e\nDesigned to enhance the useful signal or protect the optical train depending on the type of filter.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eBetter contrast\u003c\/li\u003e\n\n\u003cli\u003eDedicated use\u003c\/li\u003e\n\n\u003cli\u003eUseful accessory\u003c\/li\u003e\n\n\u003cli\u003eMore effective setup\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePractical compatibility\u003c\/h2\u003e\n\n\u003cp\u003e\nSuitable for setups and accessories in the format indicated in the title.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eSimple assembly\u003c\/li\u003e\n\n\u003cli\u003eGood integration\u003c\/li\u003e\n\n\u003cli\u003ePracticality\u003c\/li\u003e\n\n\u003cli\u003eTargeted use\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eApplications\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eAstrophotography\u003c\/li\u003e\n\n\u003cli\u003ePlanetary\u003c\/li\u003e\n\n\u003cli\u003eDeep-sky\u003c\/li\u003e\n\n\u003cli\u003eOptical protection\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003ctbody\u003e\n\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eAstronomical filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFormat\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e1.25 inches\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePackage contents\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eOptolong SII Filter 1.25\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003e\nTake advantage of free shipping throughout Italy for orders over €199.99!\n\n\u003c\/div\u003e\n\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120826286296,"sku":"67556","price":81.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/7c37ebafec609bed5a0ae1bc4e796865_add50136-6377-4484-acee-406d2e0f36da.jpg?v=1764072363"},{"product_id":"optolong-filtro-u-venus-1-25","title":"Optolong U-Venus Filter 1.25''","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong Venus U Filter 1.25''\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong Venus ultraviolet filter. The Venus U filter allows for imaging (CCD, DSLR, Video) in the ultraviolet spectrum, thereby making cloud structures in the atmosphere of Venus visible. Many cameras are sensitive in the wavelengths between 350 and 1100 nm. The filter allows light to pass through between approximately 320 and 400 nm (UV). However, your camera must not have a UV\/IR cut filter present, otherwise the transmitted light would be blocked from the start. Some refractor lenses also block UV radiation. Therefore, the ideal telescopes are Newtonians and RCs. The advantages at a glance: Allows for photographing Venus in the UV spectrum. Features anti-reflective multi-coating. Precision optical polishing up to 1\/4 lambda on both sides of the substrate. Warning, this filter must never be used alone for observing the Sun! Warning, this filter must never be used alone for observing the Sun!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eMaterial: Schott glass\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multiple\u003c\/li\u003e\n\n\u003cli\u003eFrame: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 80\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 1\/4\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong Venus U Filter 1.25''\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eComet Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emultiple\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e80\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSchott glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eComet Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eVenus\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120832446680,"sku":"59434","price":166.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/9c1dfe3741f6deaacfcd38ce7944bd89.jpg?v=1764072461"},{"product_id":"optolong-filtro-ubvri-set-photometric-1-25","title":"Optolong UBVRI photometric filter set 1.25''","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong UBVRI photometric filter set 1.25''\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong UBVRI photometric filter set - mounted. This UBVRI photometric filter set consists of five filters in a 1.25\" or 2\" round cell: ultraviolet (U), blue (B), visual (V), red (R), and infrared (I). This set is manufactured using high-quality branded glass with ion-assisted deposition multi-layer coating, which guarantees extreme scratch resistance and ensures the stability of the central wavelength. The set is designed for use with filter wheels, with both 1.25\" and 2\" slots. Quality materials: German-manufactured branded glass substrate, 1.85 mm thick. Multi-layer anti-reflection coating, deposited via electron-beam evaporation and ion-assisted deposition. Quality finishes: Substrate with precision optical polishing down to 1\/4 lambda and \u0026lt;30 arcseconds of parallelism on both sides. 60\/40 polish quality according to MIL-O-13830 specifications. Uniform and precise coating method ensuring high passband transmission and precise off-band blocking. Each filter comes with a plastic case with EVA padding. Warning: this filter must never be used alone for observing the Sun! Warning: this filter must never be used alone for observing the Sun!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eMaterial: Schott glass\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multiple\u003c\/li\u003e\n\n\u003cli\u003eMount: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 70\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 1\/4\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong UBVRI photometric filter set 1.25''\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emultiple\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMount\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e70\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSchott glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120839885016,"sku":"59437","price":591.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/20923c78f699c890db52285a2fa5a0a3_be5907ce-bea0-4b4b-9659-c3ba58e0ae59.jpg?v=1764072565"},{"product_id":"optolong-filtro-clear-sky-filter-82mm","title":"Optolong Clear Sky Filter 82mm","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.7; color: #333;\"\u003e\n\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003e\n\nOptolong Clear Sky Filter 82mm\n\n\u003c\/h1\u003e\n\n\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003e\nThe \u003cstrong\u003eOptolong Clear Sky Filter 82mm\u003c\/strong\u003e is a \u003cstrong\u003escrew-in filter for camera lenses\u003c\/strong\u003e designed to reduce light pollution, improve contrast in night shots, and better highlight emission nebulae with 82 mm optics.\n\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eBandwidth management\u003c\/h2\u003e\n\n\u003cp\u003e\nDesigned to enhance the useful signal or protect the optical train depending on the type of filter.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eBetter contrast\u003c\/li\u003e\n\n\u003cli\u003eDedicated use\u003c\/li\u003e\n\n\u003cli\u003eUseful accessory\u003c\/li\u003e\n\n\u003cli\u003eMore effective setup\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePractical compatibility\u003c\/h2\u003e\n\n\u003cp\u003e\nSuitable for setups and accessories of the format indicated in the title.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eSimple mounting\u003c\/li\u003e\n\n\u003cli\u003eGood integration\u003c\/li\u003e\n\n\u003cli\u003ePracticality\u003c\/li\u003e\n\n\u003cli\u003eTargeted use\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eApplications\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eAstrophotography\u003c\/li\u003e\n\n\u003cli\u003ePlanetary\u003c\/li\u003e\n\n\u003cli\u003eDeep-sky\u003c\/li\u003e\n\n\u003cli\u003eOptical protection\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003ctbody\u003e\n\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eClear sky filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eThread diameter\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e82 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eLight pollution reduction\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eUse\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eAstrophotography with camera lenses\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePackage contents\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eOptolong Clear Sky Filter 82mm\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003e\nTake advantage of free shipping throughout Italy for orders over €199.99!\n\n\u003c\/div\u003e\n\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120839983320,"sku":"69501","price":180.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/f62a08e78fa53e786af76fe3cf2bb300.jpg?v=1764072566"},{"product_id":"optolong-filtro-h-alpha-3nm-2","title":"Optolong H-alpha 3nm 2\" Filter","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong H-alpha 3nm 2\" Filter\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eWith the \u003cstrong\u003eOptolong H-alpha 3nm 2\" Filter\u003c\/strong\u003e, \u003cstrong\u003eOptolong\u003c\/strong\u003e offers a tool with attention to detail, precision, and built to last.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:10px;\"\u003eH-alpha filter: this narrowband nebula filter allows red light with a wavelength of 656 nanometers to pass through. This is the line where HII regions (hydrogen nebulae) shine.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection (eyepiece side): 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eBandwidth (nm): 656\u003c\/li\u003e\n\n\u003cli\u003eFull Width at Half Maximum (nm): 3\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong H-alpha 3nm 2\" Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eH-Alpha Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (eyepiece side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBandwidth (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e656\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFull Width at Half Maximum (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e3\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technology\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003elinear filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution reduction\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eH-alpha\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eEmission nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120863412440,"sku":"73721","price":342.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/c8d4c56093945f1336fb97ea9dc88f19.jpg?v=1764073037"},{"product_id":"optolong-filtro-sho-filter-kit-3nm-2","title":"Optolong SHO 3nm 2\" Filter Kit","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong SHO 3nm 2\" Filter Kit\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eThe \u003cstrong\u003eOptolong SHO 3nm 2\" Filter Kit\u003c\/strong\u003e is a quality \u003cstrong\u003eOptolong\u003c\/strong\u003e product, designed to offer reliable performance and excellent results for both enthusiasts and experienced users.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection: 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eMount material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multi-coated (plane-parallel)\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong SHO 3nm 2\" Filter Kit\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCombinations and sets\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMount material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated (plane-parallel)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFull width at half maximum (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e3\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eQuantity\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e3\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003elinear filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for visual observation\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution reduction\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eGalaxies and star clusters\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eH-alpha\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120872325336,"sku":"73684","price":1061.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/8ec90c4cc7d35bbdeccfdab5a49341eb.jpg?v=1764073245"},{"product_id":"optolong-filtro-l-pro-clip-sony-full-frame","title":"Optolong L-Pro Clip Filter for Sony Full Frame","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-Pro Clip Filter for Sony Full Frame\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong Filter This filter is designed to improve the contrast of deep-sky objects and attenuate background sky brightness, thanks to a sophisticated transmission that allows the light of specific lines where deep-sky objects shine (H-alpha, O-III, N-II, H-Beta, S-II…) to pass through, while blocking harmful light emissions (for example, the Hg line or the wavelengths of sodium vapor lighting). It also reduces the background brightness caused by atmospheric oxygen (“sky glow”). Use of this filter is recommended in areas with light pollution and is suitable for both visual and photographic use. Compared to other light pollution reduction filters, such as UHC or CLS filters, this is a multi-band pass filter that has minimal impact on color rendering. Therefore, it is suitable for photographing objects that emit continuous light: not only emission nebulae, but also galaxies, star clusters, reflection nebulae, etc. You can achieve exposures up to 3 times longer compared to shots taken without a filter. Treatment characteristics: The coatings are not cemented to the optical substrate, but are applied via electron-beam evaporation followed by ion-beam-assisted deposition (IBAD process). This special process allows for extreme durability and scratch resistance, ensures the stability of the central wavelength (CWL), and prevents thermal drift. Furthermore, it allows for high transmission in the passband and high optical density in the blocked frequency range. Attention, this filter must never be used alone for observing the Sun!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eMaterial: Schott glass\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multi-coated\u003c\/li\u003e\n\n\u003cli\u003eFrame: Clip Filter\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 95\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 1\/4\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-Pro Clip Filter for Sony Full Frame\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBroadband Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eClip Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e95\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSchott glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eWidth (mm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e71\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution filter\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eGalaxies and star clusters\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120875634904,"sku":"71253","price":236.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/36dd1ebff259bb621a6f2d24cc8c9610.jpg?v=1764073313"},{"product_id":"optolong-filtro-l-pro-filter-77mm","title":"Optolong L-Pro Filter 77mm","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-Pro Filter 77mm\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong filter. This filter is designed to improve the contrast of deep-sky objects and attenuate background sky brightness, thanks to sophisticated transmission that lets through light from the lines where deep-sky objects shine (H-alpha, O-III, N-II, H-Beta, S-II...), while blocking harmful light emissions (for example, the Hg line or sodium vapor lighting wavelengths). It also reduces background brightness caused by atmospheric oxygen (\"sky glow\"). The use of this filter is recommended in areas with light pollution and is suitable for both visual and photographic use. Compared to other light pollution reduction filters, such as UHC or CLS filters, this is a multi-band pass filter that has minimal impact on color rendition. It is therefore suitable for photographing objects that emit continuous light: not only emission nebulae, but also galaxies, star clusters, reflection nebulae, etc. You can achieve exposures up to 3 times longer compared to shots taken without a filter. Treatment characteristics: The coatings are not cemented onto the optical substrate, but applied by electron-beam evaporation followed by ion-beam-assisted deposition (IBAD process). This special process allows for extreme durability and scratch resistance, ensures the stability of the central wavelength (CWL), and prevents thermal drift. Furthermore, it allows for high transmission in the passband and high optical density in the blocked frequency range. Attention: this filter must never be used alone for observing the Sun!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and rewarding observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eMaterial: lens\u003c\/li\u003e\n\n\u003cli\u003eConnection (camera side): 77mm\u003c\/li\u003e\n\n\u003cli\u003eFrame: Lens filters\u003c\/li\u003e\n\n\u003cli\u003eMount material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eOptic coating: multi-coated (plane-parallel)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-Pro Filter 77mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBroadband Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (camera side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e77mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLens filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMount material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptic coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated (plane-parallel)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBroadband Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003elens\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eGalaxies and star clusters\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution filter\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120878026968,"sku":"73946","price":303.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/4877e10eae7bbd7a5d25fcfe058fb1dd.jpg?v=1764073375"},{"product_id":"optolong-filtro-l-ultimate-1-25","title":"Optolong L-Ultimate Filter 1.25\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-Ultimate Filter 1.25\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eIn short: Exceptional optical quality and properties. 3 nm dual-band filter for nebula astrophotography. Transmission of H-alpha and OIII lines. Additional protection against light pollution. The Optolong L-Ultimate dual-band filter features a full width at half maximum (FWHM) of only 3 nm and is an excellent filter against light pollution for the reddish H-alpha and blue-green OIII wavelengths in astrophotography. Furthermore, it highlights weaker nebulae and brings out fine details. It has the same quality and coating as other Optolong filters and can also be used for fast focal ratios, down to approximately f\/4. It does not matter whether you use DSLR, CMOS (mono or color), or CCD cameras.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection (eyepiece side): 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eBandwidth (nm): OIII (500.7), H-alpha (656.3)\u003c\/li\u003e\n\n\u003cli\u003eFull width at half maximum (nm): 3\u003c\/li\u003e\n\n\u003cli\u003eManufacturing technique: line filter\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-Ultimate Filter 1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eDual-band narrowband filter (Hα+OIII 3 nm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (eyepiece side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBandwidth (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOIII (500.7), H-alpha (656.3)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFull width at half maximum (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e3\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eline filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eH-alpha\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eEmission nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120908501208,"sku":"79624","price":224.99,"currency_code":"EUR","in_stock":true}]},{"product_id":"optolong-filtro-planetary-filter-set-1-25","title":"Optolong Planetary Filter Set 1.25\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong Planetary Filter Set 1.25\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eThe \u003cstrong\u003eOptolong Planetary Filter Set 1.25\"\u003c\/strong\u003e is the ideal choice for those looking for a reliable and high-performance \u003cstrong\u003eOptolong\u003c\/strong\u003e product, perfect for astronomical observation.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multi-coated\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eFrame: 1.25\"\u003c\/li\u003e\n\n\u003cli\u003eManufacturing technique: Comet filter\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong Planetary Filter Set 1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eComet filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.25\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eComet filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution reduction\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eDaytime and twilight observation\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMoon\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMoon and planets\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120908566744,"sku":"75326","price":227.99,"currency_code":"EUR","in_stock":true}]},{"product_id":"optolong-filtro-l-extreme-f2-2","title":"Optolong L-eXtreme Filter F2 (2\")","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-eXtreme F2 Filter (2\")\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eThe Optolong L-eXtreme is a 7nm dual-bandpass filter that can be used with one-shot color cameras, such as DSLRs (digital single-lens reflex cameras) and monochrome CCD cameras. It is also suitable for \"fast\" optical systems.\u003c\/p\u003e \u003cp\u003eThe nature of this filter makes it possible to photograph emission nebulae even in skies with heavy light pollution. Optolong believes the design of the L-eXtreme filter is a better choice for fast systems at a competitive price. The Optolong L-eXtreme filter isolates the H-Alpha and OIII emission lines of nebulae, maximizing the contrast and signal-to-noise ratio between nebulae. For people living in heavily light-polluted areas or who want to take photos when the moon is out, the L-eXtreme is an excellent filter.\u003c\/p\u003e \u003cp\u003eUnlike the L-eNhance filter, which is a tri-band filter (transmitting Hb, Ha, and OIII), the L-eXtreme filter is a dual-band filter that allows the passage of the H-Alpha and OIII emission lines.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and fulfilling observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multiple\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 99\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 4\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-eXtreme F2 Filter (2\")\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUHC Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emultiple\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e99\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (eyepiece side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUHC Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eDiameter (″)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120908599512,"sku":"80191","price":288.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/dd094e6a5d918e9859473d819b26375f.jpg?v=1764074153"},{"product_id":"optolong-filtro-sii-3nm-2","title":"Optolong 2\" SII 3nm Filter","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong SII 3nm 2\" Filter\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eSII filter: this narrowband filter allows light from ionized sulfur atoms to pass through at 672 nanometers. This is the line where many planetary nebulae, emission nebulae, and supernova remnants shine.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eBandpass (nm): 672\u003c\/li\u003e\n\n\u003cli\u003eFull Width at Half Maximum (nm): 3\u003c\/li\u003e\n\n\u003cli\u003eConnection (eyepiece side): 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eManufacturing technique: linear filter\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong SII 3nm 2\" Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSII Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBandpass (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e672\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFull Width at Half Maximum (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e3\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (eyepiece side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003elinear filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eEmission nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120908665048,"sku":"73723","price":815.99,"currency_code":"EUR","in_stock":true}]},{"product_id":"optolong-filtro-planetary-filter-set-2","title":"Optolong Planetary Filter Set 2\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong Planetary Filter Set 2\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eDesigned to ensure consistent quality, the \u003cstrong\u003eOptolong Planetary Filter Set 2\"\u003c\/strong\u003e combines \u003cstrong\u003eOptolong\u003c\/strong\u003e technology with high-level materials and manufacturing.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multi-coated\u003c\/li\u003e\n\n\u003cli\u003eMount material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eManufacturing technique: Comet filter\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong Planetary Filter Set 2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eComet filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMount material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eComet filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for visual observation\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eDaytime and twilight observation\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMoon\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMoon and planets\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120908697816,"sku":"75327","price":329.99,"currency_code":"EUR","in_stock":true}]},{"product_id":"optolong-filtro-l-pro-clip-sony-full-frame-v2","title":"Optolong L-Pro Clip Filter for Sony Full Frame V2","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-Pro Clip Filter for Sony Full Frame V2\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003e\u003cstrong\u003e1. The Optolong L-Pro Filter\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Optolong L-Pro (L-Professional) filter is designed to improve the visibility of many deep-sky objects. It selectively reduces the transmission of light pollution wavelengths, particularly those from artificial lighting (mercury vapor lamps, high and low-pressure sodium lamps) and unwanted natural light due to neutral oxygen emission in the atmosphere (\"skyglow\"). At the same time, it remains highly transparent to the main emission lines of nebulae: OIII (496 nm and 500 nm), H-beta (486 nm), NII (654 nm and 658 nm), H-alpha (656 nm), and SII (672 nm). For this reason, it is suitable for increasing contrast and detail, both for visual observation and photography, in peri-urban areas with strong light pollution.\u003c\/p\u003e\n\n\u003cp\u003eUnlike other light pollution filters such as UHC and CLS, the L-Pro is a multiband filter that offers better color balance thanks to transmission bands that are as wide as possible. The balanced transmission allows you to photograph broadband emission objects, such as galaxies, reflection nebulae, and globular clusters, with minimal color casting. The L-Pro is the best choice for attenuating light pollution.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMain Use and Performance\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eSuitable for visual observation and astrophotography. The L-Pro filter attenuates the light of continuous-spectrum objects very little, so it is very effective against light pollution when imaging galaxies, reflection nebulae, and globular clusters; the same applies to the visual observation of stars. On its own, it also blocks infrared, so it can be used safely for luminance (\"L\") imaging with CCD cameras.\u003c\/p\u003e\n\n\u003cp\u003eLight pollution filters do not eliminate the effects of light pollution and do not increase the brightness of objects: in most cases, they increase the contrast between the nebula and the sky background without making the nebula itself brighter.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e Optolong filters are not designed for solar observation. NEVER LOOK AT THE SUN WITH AN OPTOLONG FILTER: ignoring this warning can cause blindness.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e2. Specifications of the Sony-FF clip filter (new mount)\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eMaterial: optical glass\u003c\/li\u003e\n\n\u003cli\u003eThickness: 1.0 mm\u003c\/li\u003e\n\n\u003cli\u003eBlocking range: 300-750 nm\u003c\/li\u003e\n\n\u003cli\u003eBlocking depth: light pollution lines blocked by over 90%\u003c\/li\u003e\n\n\u003cli\u003eSurface quality: 60\/40\u003c\/li\u003e\n\n\u003cli\u003eFlatness: λ\/4\u003c\/li\u003e\n\n\u003cli\u003eParallelism: 30″\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e3. Compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eCameras: A7M \/ A7M2 \/ A7M3 \/ A7R \/ A7R2 \/ A7R3 \/ A7S \/ A7S2 \/ A7S3 \/ A9\u003c\/li\u003e\n\n\u003cli\u003eLenses: entire range of E-mount lenses\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003eSince it is impossible to test all lenses, Optolong has tested the most popular ones on the market.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e4. Packaging\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eSilver outer box, plastic case (PP), high-density white EVA interior. Contents: L-Pro filter, triangular installation tool, and instructions.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey Features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eMaterial: Schott glass\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multi-coated\u003c\/li\u003e\n\n\u003cli\u003eFrame: Clip Filter\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 95\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 1\/4\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain Technical Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-Pro Clip Filter for Sony Full Frame V2\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBroadband Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eClip Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e95\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for ...\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSony\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSchott glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eWidth (mm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e71\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAnti-light pollution\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eGalaxies and star clusters\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51120908796120,"sku":"79800","price":197.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/9e4d9c49e5a7355f5feee3b6b25f3587.jpg?v=1764074157"},{"product_id":"optolong-filtro-l-ultimate-2","title":"Optolong L-Ultimate 2\" – Ultra-Narrowband Dual-Band Hα and OIII Astronomical Filter","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.6; color: #333;\"\u003e\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003eOptolong L-Ultimate 2\" – Ultra-Narrowband Dual-Band Hα and OIII Astronomical Filter\u003c\/h1\u003e\n\n\u003c!-- Descrizione breve --\u003e\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003eThe \u003cstrong\u003eOptolong L-Ultimate 2\"\u003c\/strong\u003e is an \u003cstrong\u003eultra-narrowband dual-band astronomical filter\u003c\/strong\u003e, designed for demanding astrophotographers who want to maximize the contrast of emission nebulae. Selective on the \u003cstrong\u003eHα (656nm)\u003c\/strong\u003e and \u003cstrong\u003eOIII (500.7nm)\u003c\/strong\u003e wavelengths with a bandwidth of only \u003cstrong\u003e3nm\u003c\/strong\u003e for each channel, it minimizes light pollution and unwanted glare, offering spectacular images even from urban skies. Perfect for color CMOS and CCD cameras, it allows for capturing very fine details while maintaining faithful colors and an extremely dark sky background.\u003c\/p\u003e\n\n\u003c!-- Punti di forza --\u003e\n\u003cul style=\"margin-top: 15px; padding-left: 20px;\"\u003e\n\n\u003cli\u003eUltra-narrowband Hα and OIII dual-band filter\u003c\/li\u003e\n\n\u003cli\u003e2\" (48mm) diameter\u003c\/li\u003e\n\n\u003cli\u003eBandwidth reduced to 3nm for each channel\u003c\/li\u003e\n\n\u003cli\u003eMaximum reduction of light pollution\u003c\/li\u003e\n\n\u003cli\u003eExceptional contrast on emission nebulae\u003c\/li\u003e\n\n\u003cli\u003eIdeal for deep-sky astrophotography from urban skies\u003c\/li\u003e\n\n\u003cli\u003eCompatible with color CMOS\/CCD cameras and modified DSLRs\u003c\/li\u003e\n\n\u003cli\u003ePrecision optical glass construction with multi-layer coating\u003c\/li\u003e\n\n\u003cli\u003eAnti-reflective black anodized aluminum frame\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- Specifiche tecniche --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth style=\"padding: 8px; border: 1px solid #ccc; background: #f9f9f9;\"\u003eParameter\u003c\/th\u003e\n\n\u003cth style=\"padding: 8px; border: 1px solid #ccc; background: #f9f9f9;\"\u003eValue\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong L-Ultimate 2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eUltra-narrowband dual-band astronomical filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDiameter\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2\" (48mm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eWavelengths\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eHα (656nm), OIII (500.7nm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBandwidth\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e3nm per channel\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e\u0026gt;90% on main lines\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003ePrecision optical glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eTreatment\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eAnti-reflective multi-layer coating\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCompatibility\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eColor CMOS\/CCD, modified DSLRs\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eApplications\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDeep-sky astrophotography, emission nebulae\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eAnti-reflective black anodized aluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003c!-- Box finale --\u003e\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping in Italy\u003c\/strong\u003e\u003cbr\u003eProducts costing over \u003cstrong\u003e€199.99\u003c\/strong\u003e qualify for \u003cstrong\u003efree shipping\u003c\/strong\u003e.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eNB:\u003c\/strong\u003e Official \u003cstrong\u003eOptolong\u003c\/strong\u003e warranty with support and technical assistance in Italy.\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121300799704,"sku":"76371","price":390.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/b827b9977ef58f1694b09bfc4587d849.jpg?v=1764082459"},{"product_id":"optolong-filtro-l-pro-2","title":"Optolong L-Pro Filter 2''","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-Pro Filter 2''\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong Filter This filter is designed to improve the contrast of deep-sky objects and attenuate background sky brightness, thanks to sophisticated transmission that lets through light from the lines where deep-sky objects glow (H-alpha, O-III, N-II, H-Beta, S-II...), while blocking harmful light emissions (e.g., the Hg line or sodium vapor lighting wavelengths). It also reduces background brightness caused by atmospheric oxygen (“sky glow”). Use of this filter is recommended in areas with light pollution and is suitable for both visual and photographic use.\u003c\/p\u003e \u003cp\u003eCompared to other light pollution reduction filters, such as UHC or CLS filters, this is a multi-band pass filter that has only a minimal impact on color rendering. Therefore, it is suitable for photographing objects that emit continuous light: not only emission nebulae, but also galaxies, star clusters, reflection nebulae, etc. You can achieve exposures up to 3 times longer compared to shots taken without a filter.\u003c\/p\u003e \u003cp\u003eCoating features: The coatings are not cemented onto the optical substrate, but applied via electron-beam evaporation followed by ion-beam assisted deposition (IBAD process). This special process allows for extreme durability and scratch resistance, ensures the stability of the central wavelength (CWL), and prevents thermal drift. Furthermore, it allows for high transmission in the passband and high optical density in the blocked frequency range. Caution: this filter must never be used alone for observing the Sun!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eMaterial: Schott glass\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multiple\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 95\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-Pro Filter 2''\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBroadband Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emultiple\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e95\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSchott glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eWidth (mm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1.85\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121301553368,"sku":"59435","price":199.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/2de01ab922a5ae62ed2f71e488698ef4.jpg?v=1764082477"},{"product_id":"optolong-filtro-l-enhance-2","title":"Optolong L-eNhance Filter 2\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong L-eNhance Filter 2\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eThe L-eNhance dual-bandpass filter allows you to photograph nebulae with color cameras and significantly reduces light pollution. The H-alpha, H-beta, and O-III spectral lines can pass through almost unimpeded. Light pollution areas are blocked, making deep-sky photography possible even from the city! The evocative colors of the nebulae are preserved to the best effect to create a natural impression. The filter allows you to capture images with quality approaching that of monochrome cameras with narrowband filters! The filter surface, with a fine optical polish, has undergone a multi-layer treatment. The filter cell is made of optical glass from SCHOTT, Germany.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eMount material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eFilter thickness (mm): 2\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multi-coated\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong L-eNhance Filter 2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTri-band narrowband filter (Hα, Hβ, OIII)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eMount material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter thickness (mm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUHC filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAnti-light pollution\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121316724952,"sku":"63802","price":209.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/595086739aca1ffad9b8acbabbdf2eda.jpg?v=1764082882"},{"product_id":"optolong-filtro-l-extreme-2","title":"Optolong L-eXtreme 2\" – Ha and OIII Dual-Band Astronomical Filter","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.6; color: #333;\"\u003e\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003eOptolong L-eXtreme 2\" – Dual-Band Ha and OIII Astronomical Filter\u003c\/h1\u003e\n\n\u003c!-- Descrizione breve --\u003e\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003eThe \u003cstrong\u003eOptolong L-eXtreme 2\"\u003c\/strong\u003e is a \u003cstrong\u003edual-band astronomical filter\u003c\/strong\u003e specifically designed for color deep-sky astrophotography. With a bandwidth of approximately \u003cstrong\u003e7nm\u003c\/strong\u003e for each line, it precisely selects the \u003cstrong\u003eHydrogen-Alpha (656nm)\u003c\/strong\u003e and \u003cstrong\u003eOxygen III (500.7nm)\u003c\/strong\u003e wavelengths, drastically reducing light pollution. Perfect for capturing \u003cstrong\u003eemission nebulae and HII regions\u003c\/strong\u003e, it allows for high-contrast, detailed images with natural colors even from urban skies.\u003c\/p\u003e\n\n\u003c!-- Punti di forza --\u003e\n\u003cul style=\"margin-top: 15px; padding-left: 20px;\"\u003e\n\n\u003cli\u003eDual-band Ha and OIII astronomical filter\u003c\/li\u003e\n\n\u003cli\u003eStandard 2\" (48mm) diameter\u003c\/li\u003e\n\n\u003cli\u003eNarrow bandwidth (~7nm) for each channel\u003c\/li\u003e\n\n\u003cli\u003eEffective light pollution reduction\u003c\/li\u003e\n\n\u003cli\u003eOptimized for nebulae and HII regions\u003c\/li\u003e\n\n\u003cli\u003eCompatible with color CMOS\/CCD cameras and modified DSLRs\u003c\/li\u003e\n\n\u003cli\u003ePrecision optical glass with multi-layer coating\u003c\/li\u003e\n\n\u003cli\u003eAnti-reflective black anodized aluminum frame\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- Specifiche tecniche --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eTechnical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth style=\"padding: 8px; border: 1px solid #ccc; background: #f9f9f9;\"\u003eParameter\u003c\/th\u003e\n\n\u003cth style=\"padding: 8px; border: 1px solid #ccc; background: #f9f9f9;\"\u003eValue\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong L-eXtreme 2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDual-band astronomical filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDiameter\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2\" (48mm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eWavelengths\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eHa (656nm), OIII (500.7nm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBandwidth\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e~7nm per channel\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e\u0026gt;90% at main lines\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eMaterial\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003ePrecision optical glass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eTreatment\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eMulti-layer anti-reflective coating\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCompatibility\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eColor CMOS\/CCD, modified DSLRs\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eApplications\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDeep-sky nebula astrophotography\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eAnti-reflective black anodized aluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003c!-- Box finale --\u003e\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping in Italy\u003c\/strong\u003e\u003cbr\u003eProducts with a price over \u003cstrong\u003e199.99 €\u003c\/strong\u003e qualify for \u003cstrong\u003efree shipping\u003c\/strong\u003e.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Official \u003cstrong\u003eOptolong\u003c\/strong\u003e warranty with support and technical assistance in Italy.\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121316757720,"sku":"66894","price":290.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/2ebaaf27fe0adee7ae75713aee855844_7e331a2b-3801-42d0-aeca-544afd0c2b75.jpg?v=1764082884"},{"product_id":"optolong-filtro-uhc-filter-1-25","title":"Optolong UHC Filter 1.25\"","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.7; color: #333;\"\u003e\n\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003e\n\nOptolong UHC Filter 1.25\n\n\u003c\/h1\u003e\n\n\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003e\nThe \u003cstrong\u003eOptolong UHC Filter 1.25\u003c\/strong\u003e is a \u003cstrong\u003e1.25-inch nebula filter\u003c\/strong\u003e designed to increase the contrast of diffuse objects and help reduce sky background brightness in visual observations and certain photographic applications.\n\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eOptical contrast\u003c\/h2\u003e\n\n\u003cp\u003e\nDesigned to improve the readability of the subject being observed or captured.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eIncreased contrast\u003c\/li\u003e\n\n\u003cli\u003eUseful accessory\u003c\/li\u003e\n\n\u003cli\u003eSimple integration\u003c\/li\u003e\n\n\u003cli\u003eAstronomical use\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePractical compatibility\u003c\/h2\u003e\n\n\u003cp\u003e\nSuitable for setups and accessories compatible with the indicated format.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eSimple mounting\u003c\/li\u003e\n\n\u003cli\u003eDedicated use\u003c\/li\u003e\n\n\u003cli\u003eImmediate practicality\u003c\/li\u003e\n\n\u003cli\u003eOrganized workflow\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eApplications\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eAstronomical observation\u003c\/li\u003e\n\n\u003cli\u003eNebulae or specific subjects\u003c\/li\u003e\n\n\u003cli\u003eAstrophotography\u003c\/li\u003e\n\n\u003cli\u003eOptical setup\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003ctbody\u003e\n\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eAstronomical filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFormat\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e1.25 inches\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eUHC \/ Ultra High Contrast\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePackage contents\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eOptolong UHC Filter 1.25\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003e\nTake advantage of free shipping throughout Italy for orders over €199.99!\n\n\u003c\/div\u003e\n\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121316823256,"sku":"67543","price":57.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/1475935f2f3ff1d67b2dc5470952f59e.jpg?v=1764082889"},{"product_id":"optolong-filtro-sho-filter-kit-2","title":"Optolong SHO Filter Kit 2\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong SHO Filter Kit 2\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eNarrowband filters increase contrast by allowing only a certain range of light wavelengths corresponding to specific spectral lines to pass through, for example, Hydrogen (H-a, 656nm), Oxygen (OIII, 501nm), Sulfur (SII, 672nm), etc. The filters can always be used for photography, even when the Moon is visible, or as a light pollution filter in the city. The exposure time duration is not critical: you can also take long-exposure photographs. OIII filter: the narrowband nebula filter allows light at 500 nanometers to pass. This is the doubly ionized oxygen line. Planetary nebulae and supernova remnants glow in this color. H-alpha filter: this narrowband nebula filter allows red light with a wavelength of 656 nanometers to pass. This is the line at which HII regions (hydrogen nebulae) shine. SII filter: the narrowband filter allows light from ionized sulfur atoms at 672 nanometers to pass. This is the line at which many planetary nebulae, emission nebulae, and supernova remnants shine.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection: 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eOptics coating: multi-layer (plane-parallel)\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong SHO Filter Kit 2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCombinations and sets\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptics coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-layer (plane-parallel)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003elinear filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution blocking\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eGalaxies and star clusters\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eH-alpha\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121335206104,"sku":"67530","price":583.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/ce6718a61734433f70e430cd5318442a_9732c1ff-0ad4-4f7b-a86a-0afa11731d4f.jpg?v=1764083270"},{"product_id":"optolong-filtro-lrgb-filter-set-2","title":"Optolong LRGB Filter Set 2\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong LRGB Filter Set 2\"\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eLRGB filter set - Astrophotography with monochrome CCD cameras Four filters for a color image: With the LRGB filter set, you can photograph the sky in color using a monochrome chip. Monochrome astronomical CCD cameras capture deep-sky objects at high resolutions because all the pixels on the chip work for the same image. With color CCD chips, resolution is reduced because 1\/4 of the pixels are used for the color image. With an LRGB filter set and a monochrome camera, you can use the entire chip for high-resolution shots. L - The luminance filter The luminance filter lets all visible light pass through and blocks the near-UV and IR range. Therefore, with the luminance filter, you capture all the object's information. RGB - each filter has its own task The three letters in RGB indicate three different color filters with which color images are obtained. The colors we perceive are derived from the three primary colors: Red, Green, and Blue. All the colors we know are generated from these. Our eyes also mix all the colors of our world using internal RGB receptors (or filters). During the image processing phase, the four LRGB channel images are combined. This is how the color image is generated. Tip: For photographing with the LRGB filter set, use an Omegon filter wheel to change filters in seconds. The advantages at a glance: LRGB filter set for color images with monochrome CCD cameras Full chip resolution thanks to four different color filters Durable: scratch-resistant coating Natural colors for deep-sky objects and planets\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection: 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eOptic coating: multi-coated (plane-parallel)\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong LRGB Filter Set 2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptic coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated (plane-parallel)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eGalaxies and star clusters\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution filter\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy on orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121341956312,"sku":"67534","price":295.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/1dd55f84ab8bce3c5fb982af475365d1_ba316af4-8c6d-42b6-8806-7a674549fb2b.jpg?v=1764083353"},{"product_id":"optolong-filtro-uhc-2","title":"Optolong UHC Filter 2\"","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.7; color: #333;\"\u003e\n\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003e\n\nOptolong 2\" UHC Filter\n\n\u003c\/h1\u003e\n\n\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003e\nThe \u003cstrong\u003eOptolong 2\" UHC Filter\u003c\/strong\u003e is a \u003cstrong\u003e2-inch nebula filter\u003c\/strong\u003e designed to increase the contrast of nebulae and diffuse objects, helping to reduce sky background brightness caused by light pollution.\n\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eImproved contrast\u003c\/h2\u003e\n\n\u003cp\u003e\nDesigned to increase contrast on nebulae and diffuse objects.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eMore controlled sky background\u003c\/li\u003e\n\n\u003cli\u003eHigher contrast\u003c\/li\u003e\n\n\u003cli\u003eUseful accessory\u003c\/li\u003e\n\n\u003cli\u003eAstronomical use\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003e2-inch format\u003c\/h2\u003e\n\n\u003cp\u003e\nCompatible with 2'' systems and accessories.\n\u003c\/p\u003e\n\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eCommon format\u003c\/li\u003e\n\n\u003cli\u003ePractical use\u003c\/li\u003e\n\n\u003cli\u003eGood integration\u003c\/li\u003e\n\n\u003cli\u003eVersatile setup\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eApplications\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eVisual observation\u003c\/li\u003e\n\n\u003cli\u003eNebulae\u003c\/li\u003e\n\n\u003cli\u003eAstrophotography\u003c\/li\u003e\n\n\u003cli\u003eLight-polluted skies\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003ctbody\u003e\n\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eAstronomical filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFormat\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2 inch \/ 50.8 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eUHC\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePackage contents\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eOptolong 2\" UHC Filter\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003e\nTake advantage of free shipping throughout Italy for orders over €199.99!\n\n\u003c\/div\u003e\n\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121342251224,"sku":"67547","price":77.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/1475935f2f3ff1d67b2dc5470952f59e_91795f73-6ff8-487c-b9e2-d019babe225d.jpg?v=1764083352"},{"product_id":"optolong-filtro-oiii-3nm-2","title":"Optolong OIII 3nm 2\" Filter","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong OIII 3nm 2\" Filter\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOIII filter: the narrowband nebula filter allows light to pass at 500 nanometers. This is the doubly ionized oxygen line. Planetary nebulae and supernova remnants are of this color.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection (eyepiece side): 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eBandwidth (nm): 500\u003c\/li\u003e\n\n\u003cli\u003eFull Width at Half Maximum (nm): 3\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong OIII 3nm 2\" Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOIII-Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (eyepiece side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBandwidth (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e500\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFull Width at Half Maximum (nm)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e3\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003elinear filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eEmission nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e-\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121342972120,"sku":"73722","price":363.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/0dacf626e1bd05e760fa87e3fd5458fc_f8d88826-1ff3-4eef-ab8f-f8f37a3ec9a4.jpg?v=1764083360"},{"product_id":"optolong-filtro-h-alpha-7nm-2-pol","title":"Optolong 7nm H-alpha Filter 2\"","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong H-alpha 7nm 2\" Filter\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eThanks to Optolong H-alpha filters, it is possible to take photographs even from heavily light-polluted skies; the passband centered on the H-alpha line at 12nm and 7nm eliminates all light pollution (including natural light caused by the Full Moon) and allows for very long exposures on emission or reflection nebulae. The 12nm version is more suitable for small telescopes or color sensors. With the 7nm filter and B\/W CCD sensors, you can capture the faintest details of nebulae even under polluted skies; obviously, under a good sky, the result will be even more spectacular!\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\u003cli\u003eFilter diameter: 2\"\u003c\/li\u003e\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong H-alpha 7nm 2\" Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2-inch Filters – 50.8mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter diameter\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121344053464,"sku":"HA7-2","price":174.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/fc1a6793a6509a23bf8ee46d95cb0636.jpg?v=1764083378"},{"product_id":"optolong-filtro-clip-filter-for-canon-eos-aps-c-l-pro","title":"Optolong Clip Filter for Canon EOS APS-C L-Pro","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong Clip Filter for Canon EOS APS-C L-Pro\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eOptolong Filter This filter is designed to improve the contrast of deep-sky objects and attenuate background sky brightness, thanks to a sophisticated transmission that allows the light of the lines in which deep-sky objects shine (H-alpha, O-III, N-II, H-Beta, S-II...) to pass through, while blocking harmful light emissions (for example, the Hg line or wavelengths from sodium vapor lighting). It also reduces background brightness caused by atmospheric oxygen (\"sky glow\"). The use of this filter is recommended in areas with light pollution and is suitable for both visual and photographic use. Compared to other light pollution reduction filters, such as UHC or CLS filters, this is a multi-band pass filter that has minimal impact on color rendition. It is therefore suitable for photographing objects that emit continuous light: not only emission nebulae, but also galaxies, star clusters, reflection nebulae, etc. You can achieve exposures up to 3 times longer compared to shots without a filter. Treatment characteristics: The treatments are not cemented onto the optical substrate, but applied via electron-beam evaporation and subsequent Ion-Assisted Deposition (IBAD process). This special process allows for extreme durability and scratch resistance, ensures central wavelength (CWL) stability, and prevents thermal drift. Furthermore, it allows for high transmission in the passband and high optical density in the blocked frequency range. Warning, this filter must never be used alone for observing the Sun! Warning, this filter must never be used alone for observing the Sun! This item is not available for customers in Germany.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and rewarding observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multiple\u003c\/li\u003e\n\n\u003cli\u003eTransmission: 95\u003c\/li\u003e\n\n\u003cli\u003eSurface accuracy: 1\/4\u003c\/li\u003e\n\n\u003cli\u003eFrame: Clip Filter\u003c\/li\u003e\n\n\u003cli\u003eSuitable for ...: Canon EOS\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eMain technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong Clip Filter for Canon EOS APS-C L-Pro\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCategory\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emultiple\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e95\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSurface accuracy\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e1\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eClip Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for ...\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eCanon EOS\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUseful for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observations\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121344086232,"sku":"59440","price":219.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/e0589181778cdee2e642a8556e032663.jpg?v=1764083380"},{"product_id":"usato-optolong-set-di-filtri-lrgb-da-2-pollici","title":"[Used] Optolong 2-inch LRGB filter set","description":"\u003cdiv class=\"product-description\" style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.7;color:#333;\"\u003e\n\n\u003ch1 style=\"font-size:24px;font-weight:bold;\"\u003eOptolong 2-inch LRGB Filter Set\u003c\/h1\u003e\n\n\u003cp style=\"font-size:18px;margin-top:10px;\"\u003eThe \u003cstrong\u003eOptolong 2-inch LRGB Filter Set\u003c\/strong\u003e is the ideal choice for those looking for a reliable and high-performance \u003cstrong\u003eOptolong\u003c\/strong\u003e product, perfect for astronomical observation.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey features\u003c\/h2\u003e\n\n\u003cp\u003eOptolong quality for a reliable and satisfying observation experience.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:20px;\"\u003e\n\n\u003cli\u003eType: Filter\u003c\/li\u003e\n\n\u003cli\u003eConnection: 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame: 2\"\u003c\/li\u003e\n\n\u003cli\u003eFrame material: Aluminum\u003c\/li\u003e\n\n\u003cli\u003eOptical coating: multi-coated (plane-parallel)\u003c\/li\u003e\n\n\u003cli\u003eConnection (telescope side): 2\"\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:20px;margin-top:30px;\"\u003eKey technical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:10px;\"\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptolong 2-inch LRGB Filter Set\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFrame material\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eAluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eOptical coating\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003emulti-coated (plane-parallel)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eConnection (telescope side)\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003e2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eFilter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eManufacturing technique\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eL-RGB Filters\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSuitable for photography\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eGalaxies and star clusters\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eNebulae and Galaxies\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003ePlanetary nebulae\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eSupernova remnants\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eyes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eUsable for visual observation\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ccc;\"\u003eno\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003cdiv style=\"background-color:#f0f8ff;padding:15px;margin-top:30px;border-left:4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eTake advantage of free shipping throughout Italy for orders over €199.99!\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121359093976,"sku":"USATO-67534","price":189.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/25384636.jpg?v=1764083626"},{"product_id":"usato-garanzia-1-anno-optolong-filtro-h-alpha-7nm-2-come-nuovo","title":"[Used 1-Year Warranty] Optolong 7nm H-Alpha 2\" filter like new","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.6; color: #333;\" class=\"product-description\"\u003e\n\n\u003c!-- 1. Titolo --\u003e\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003e[Used 1-Year Warranty] Optolong 2” H-Alpha 7nm Filter – Like New\u003c\/h1\u003e\n\n\u003c!-- 2. Descrizione breve --\u003e\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003eThe \u003cstrong\u003eOptolong 2” H-Alpha 7nm filter\u003c\/strong\u003e is a \u003cstrong\u003enarrowband filter\u003c\/strong\u003e designed for deep-sky astrophotography, ideal for isolating \u003cstrong\u003eH-alpha emission (656.3 nm)\u003c\/strong\u003e from nebulae. This item is \u003cstrong\u003eUSED\u003c\/strong\u003e, in \u003cstrong\u003eLIKE NEW\u003c\/strong\u003e condition, and covered by a \u003cstrong\u003e1-year warranty\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003c!-- 3. Caratteristiche principali --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 25px;\"\u003eKey Features\u003c\/h2\u003e\n\n\u003cul style=\"margin-top: 10px; padding-left: 20px;\"\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e7 nm bandpass\u003c\/strong\u003e for high contrast.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2” format\u003c\/strong\u003e (standard M48 thread).\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eIsolates H-alpha emission\u003c\/strong\u003e at 656.3 nm.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eEffective light pollution reduction\u003c\/strong\u003e.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eExcellent value for money\u003c\/strong\u003e.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- 4. Prestazioni in astrofotografia --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eAstroimaging Performance\u003c\/h2\u003e\n\n\u003cp\u003eThe Optolong 7nm H-Alpha filter allows you to obtain \u003cstrong\u003ehigh-contrast images\u003c\/strong\u003e of emission nebulae, improving the signal even under imperfect skies. It is ideal for deep integrations and narrowband work.\u003c\/p\u003e\n\n\u003c!-- 5. Compatibilità --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eCompatibility\u003c\/h2\u003e\n\n\u003cp\u003eCompatible with \u003cstrong\u003emonochrome astronomical cameras\u003c\/strong\u003e and \u003cstrong\u003emodified cameras\u003c\/strong\u003e. Can be used on refractors, Newtonians, and RCs with 2” filter holders or filter wheels.\u003c\/p\u003e\n\n\u003c!-- 6. Condizioni --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eCondition and Warranty\u003c\/h2\u003e\n\n\u003cp\u003eThe filter is in \u003cstrong\u003eexcellent condition\u003c\/strong\u003e, with no visible signs of wear, ready for use, and covered by a \u003cstrong\u003e1-year warranty\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003c!-- 7. Specifiche tecniche --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eMain Technical Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eH-Alpha Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBandpass\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e7 nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFormat\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2” (M48)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eStatus\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eUsed – Like new\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eWarranty\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e1 year\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003c!-- 8. Ideale per --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eIdeal For\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eNarrowband deep-sky astrophotography\u003c\/li\u003e\n\n\u003cli\u003eEmission nebulae\u003c\/li\u003e\n\n\u003cli\u003eMonochrome cameras\u003c\/li\u003e\n\n\u003cli\u003eAdvanced astronomical setups\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- 9. Contenuto confezione --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eOptolong 2” H-Alpha 7nm\u003c\/strong\u003e filter\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- 10. Box spedizione --\u003e\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eFree shipping throughout Italy for orders over \u003cstrong\u003e€199.99\u003c\/strong\u003e.\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121359487192,"sku":"USA-83198","price":149.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/25393049.jpg?v=1764083633"},{"product_id":"optolong-l-para-filtro-dual-band-2","title":"Optolong L-eNhance 2\" – 10 nm Dual Band Hα+OIII Filter for Astrophotography","description":"\u003cdiv class=\"product-description\" style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.6; color: #333;\"\u003e\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003eOptolong L-PARA 2\" – Dual Band Hα+OIII 10 nm Filter\u003c\/h1\u003e\n\n\u003c!-- Descrizione breve --\u003e\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003eThe \u003cstrong\u003eOptolong L-PARA 2\"\u003c\/strong\u003e is a \u003cstrong\u003edual-band filter\u003c\/strong\u003e: it allows only the two emission lines of nebulae to pass through, \u003cstrong\u003eHα (656.3 nm)\u003c\/strong\u003e and \u003cstrong\u003eOIII (500.7 nm)\u003c\/strong\u003e, with a \u003cstrong\u003e10 nm\u003c\/strong\u003e band each. It cuts out light pollution and a good portion of moonlight: with a \u003cstrong\u003ecolor camera\u003c\/strong\u003e, it allows for imaging emission nebulae, supernova remnants, and planetary nebulae even from city skies. Transmission remains above 85% even with \u003cstrong\u003efast optics, from f\/2 to f\/4\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003c!-- Punti di forza --\u003e\n\u003cul style=\"margin-top: 15px; padding-left: 20px;\"\u003e\n\n\u003cli\u003eDual band: Hα 656.3 nm and OIII 500.7 nm, 10 nm each\u003c\/li\u003e\n\n\u003cli\u003eTransmission over 85% on both lines, even with fast f\/2 to f\/4 optics\u003c\/li\u003e\n\n\u003cli\u003eBlocks out-of-band light from 300 to 1000 nm (average optical density over OD4)\u003c\/li\u003e\n\n\u003cli\u003eFor emission nebulae, supernova remnants, and planetary nebulae, even with the Moon and from city skies\u003c\/li\u003e\n\n\u003cli\u003eFor color cameras: CMOS, CCD, DSLR, and mirrorless\u003c\/li\u003e\n\n\u003cli\u003e2\" format with M48×0.75 threading\u003c\/li\u003e\n\n\u003cli\u003eNot suitable for galaxies, clusters, and reflection nebulae: these require a broadband filter, such as the Optolong L-Pro\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- Specifiche tecniche --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eTechnical specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth style=\"padding: 8px; border: 1px solid #ccc; background: #f9f9f9;\"\u003eParameter\u003c\/th\u003e\n\n\u003cth style=\"padding: 8px; border: 1px solid #ccc; background: #f9f9f9;\"\u003eValue\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong L-PARA 2\"\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDual band filter (Hα + OIII)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eTransmitted lines\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eHα 656.3 nm · OIII 500.7 nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBandwidth (FWHM)\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e10 nm ± 0.5 nm per line\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOver 85% on the lines, f\/2 to f\/4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOut-of-band blocking\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e300 – 1000 nm, average optical density over OD4\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eThreading\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2\" M48×0.75\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eGlass thickness\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e1.85 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCompatibility\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eColor CMOS, CCD, DSLR, and mirrorless cameras\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eApplications\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eEmission nebulae, supernova remnants, planetary nebulae\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003c!-- Box finale --\u003e\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping in Italy\u003c\/strong\u003e\u003cbr\u003eProducts costing over \u003cstrong\u003e€199.99\u003c\/strong\u003e include \u003cstrong\u003efree shipping\u003c\/strong\u003e.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Official \u003cstrong\u003eOptolong\u003c\/strong\u003e warranty with support and technical assistance in Italy.\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121360437464,"sku":"85360","price":269.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/25461093.jpg?v=1764083658"},{"product_id":"filtro-l-synergy-sii-oiii-7nm-dual-band-optolong-alta-efficienza-e-blocco-inquinamento-luminoso","title":"Optolong L-Synergy SII\/OIII 7nm Dual Band Filter – High Efficiency and Light Pollution Suppression","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.6; color: #333;\" class=\"product-description\"\u003e\n\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003eL-Synergy SII\/OIII 7nm Dual Band Filter – High Efficiency and Light Pollution Suppression\u003c\/h1\u003e\n\n\u003c!-- Descrizione breve --\u003e\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003eThe \u003cstrong\u003eL-Synergy SII\/OIII 7nm Dual Band Filter\u003c\/strong\u003e by \u003cstrong\u003eOptolong\u003c\/strong\u003e is designed for \u003cstrong\u003edeep-sky astrophotography\u003c\/strong\u003e with both color and monochrome cameras. Thanks to its dual-peak \u003cstrong\u003e7nm\u003c\/strong\u003e passband centered on \u003cstrong\u003eSulfur II (SII) and Oxygen III (OIII)\u003c\/strong\u003e emissions, it offers exceptional contrast even under skies affected by \u003cstrong\u003elight pollution\u003c\/strong\u003e. The high-efficiency multi-layer coating ensures over 90% transmission, blocking major artificial light sources and enhancing the color rendition of emission nebulae.\u003c\/p\u003e\n\n\u003c!-- Punti di forza --\u003e\n\u003cul style=\"margin-top: 15px; padding-left: 20px;\"\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eDual Band\u003c\/strong\u003e filter centered on SII (672 nm) and OIII (500 nm) emission lines\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e7nm bandwidth\u003c\/strong\u003e – perfect balance between contrast and brightness\u003c\/li\u003e\n\n\u003cli\u003eMulti-layer coating with \u003cstrong\u003e\u0026gt;90% transmission\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eEffectively blocks \u003cstrong\u003ecity glow and light pollution\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eIdeal for \u003cstrong\u003edeep-sky\u003c\/strong\u003e astrophotography with one-shot color (OSC) or monochrome cameras\u003c\/li\u003e\n\n\u003cli\u003eMade of high-quality optical glass, polished and individually tested\u003c\/li\u003e\n\n\u003cli\u003eAnti-reflection and anti-halo treatment for artifact-free images\u003c\/li\u003e\n\n\u003cli\u003eCompatible with f\/4–f\/10 telescopes and CMOS\/CCD cameras\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- Specifiche tecniche --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth style=\"padding: 8px; border: 1px solid #ccc; background: #f9f9f9;\"\u003eParameter\u003c\/th\u003e\n\n\u003cth style=\"padding: 8px; border: 1px solid #ccc; background: #f9f9f9;\"\u003eValue\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFilter type\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDual Band – SII \/ OIII\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBandwidth\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e7 nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCenter wavelengths\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eSII: 672 nm \/ OIII: 500 nm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eTransmission\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e 90%\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eLight pollution suppression\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eExcellent, blocks Hg and Na\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eGlass thickness\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eThreaded diameter\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2” (M48 × 0.75)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eTreatments\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eMulti-layer, anti-reflection, anti-halo\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCompatibility\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eCMOS\/CCD cameras and f\/4–f\/10 telescopes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eApplications\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDeep-sky photography and emission nebulae\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003c!-- Box finale --\u003e\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping in Italy\u003c\/strong\u003e\u003cbr\u003eProducts costing over \u003cstrong\u003e€199.99\u003c\/strong\u003e qualify for \u003cstrong\u003efree shipping\u003c\/strong\u003e.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Official \u003cstrong\u003eOptolong\u003c\/strong\u003e warranty and technical support in Italy for installation and configuration.\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51121373806808,"sku":"87711","price":269.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/filtro-l-synergy-siioiii-7nm-dual-band-alta-efficienza-e-blocco-inquinamento-luminoso_1.png?v=1764083911"},{"product_id":"optolong-l-qef-2-filtro-quad-band-per-astrofotografia","title":"Optolong L-QEF 2” – Quad Band Filter for Astrophotography","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 16px; line-height: 1.6; color: #333;\" class=\"product-description\"\u003e\n\n\u003c!-- 1. Titolo --\u003e\n\u003ch1 style=\"font-size: 24px; font-weight: bold;\"\u003eOptolong L-QEF 2” – Quad Band Filter\u003c\/h1\u003e\n\n\u003c!-- 2. Descrizione breve --\u003e\n\u003cp style=\"font-size: 18px; margin-top: 10px;\"\u003eThe \u003cstrong\u003eOptolong 2” L-QEF filter\u003c\/strong\u003e (Quad Enhance Filter) is an \u003cstrong\u003eadvanced multi-band filter\u003c\/strong\u003e designed for color astrophotography. It selectively isolates the main \u003cstrong\u003eH-alpha, H-beta, OIII, and SII\u003c\/strong\u003e emissions, enhancing the contrast of nebulae even under light-polluted skies.\u003c\/p\u003e\n\n\u003c!-- 3. Caratteristiche principali --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 25px;\"\u003eMain Features\u003c\/h2\u003e\n\n\u003cul style=\"margin-top: 10px; padding-left: 20px;\"\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eQuad Band Filter\u003c\/strong\u003e (Hα, Hβ, OIII, SII).\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e2” format\u003c\/strong\u003e with standard M48 threading.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eOptimized for color cameras\u003c\/strong\u003e.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eEffective light pollution reduction\u003c\/strong\u003e.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eIdeal for emission nebulae\u003c\/strong\u003e.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- 4. Prestazioni --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eAstro-imaging Performance\u003c\/h2\u003e\n\n\u003cp\u003eThe L-QEF allows for \u003cstrong\u003ehigh-contrast images\u003c\/strong\u003e with better color separation, enabling more effective post-processing compared to traditional broad-band filters. It is an ideal intermediate solution between L-Pro filters and extreme narrowband filters.\u003c\/p\u003e\n\n\u003c!-- 5. Utilizzo consigliato --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eRecommended Use\u003c\/h2\u003e\n\n\u003cp\u003ePerfect for \u003cstrong\u003edeep-sky color astrophotography\u003c\/strong\u003e with OSC cameras, especially on nebulae such as the North America, Veil, Rosette, Soul, and similar targets.\u003c\/p\u003e\n\n\u003c!-- 6. Compatibilità --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eCompatibility\u003c\/h2\u003e\n\n\u003cp\u003eCompatible with \u003cstrong\u003ecolor astronomical cameras\u003c\/strong\u003e and \u003cstrong\u003emodified DSLR\/Mirrorless cameras\u003c\/strong\u003e. Can be used on refractors, Newtonians, and RCs with 2” filter holders or filter wheels.\u003c\/p\u003e\n\n\u003c!-- 7. Specifiche tecniche --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eMain Technical Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 10px;\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eOptolong\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eModel\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eL-QEF (Quad Enhance Filter)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eType\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eQuad Band Filter\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eFormat\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003e2” (M48)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eUsage\u003c\/td\u003e\n\n\u003ctd style=\"padding: 8px; border: 1px solid #ccc;\"\u003eDeep-sky astrophotography\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\u003c!-- 8. Ideale per --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003eIdeal For\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003eEmission nebulae\u003c\/li\u003e\n\n\u003cli\u003eColor astrophotography (OSC)\u003c\/li\u003e\n\n\u003cli\u003eUrban and suburban skies\u003c\/li\u003e\n\n\u003cli\u003eAdvanced deep-sky setups\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- 9. Contenuto confezione --\u003e\n\u003ch2 style=\"font-size: 20px; margin-top: 30px;\"\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul style=\"padding-left: 20px;\"\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eOptolong L-QEF 2”\u003c\/strong\u003e filter\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003c!-- 10. Box spedizione --\u003e\n\u003cdiv style=\"background-color: #f0f8ff; padding: 15px; margin-top: 30px; border-left: 4px solid #007acc;\"\u003e\n\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e\u003cbr\u003eFree shipping throughout Italy on orders over \u003cstrong\u003e€199.99\u003c\/strong\u003e.\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":51314158043352,"sku":"83320","price":240.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/files\/filtro-l-qef-2-quad-enhance-filter-optolong.png?v=1764084194"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/0722\/6072\/collections\/optolong.jpg?v=1783533445","url":"https:\/\/www.giordanoastronomia.it\/en\/collections\/optolong-1.oembed","provider":"Giordano Astronomia","version":"1.0","type":"link"}