{"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","url":"https:\/\/www.giordanoastronomia.it\/en\/products\/filtro-l-synergy-sii-oiii-7nm-dual-band-optolong-alta-efficienza-e-blocco-inquinamento-luminoso","provider":"Giordano Astronomia","version":"1.0","type":"link"}