{"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","url":"https:\/\/www.giordanoastronomia.it\/en\/products\/optolong-l-para-filtro-dual-band-2","provider":"Giordano Astronomia","version":"1.0","type":"link"}