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