{"product_id":"optolong-filtro-l-ultimate-125","title":"Optolong L-Ultimate Filter 1.25\"","description":"\u003ch2\u003eOptolong L-Ultimate 1.25\" – 3nm Dual Narrowband Filter for Astrophotography\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eOptolong L-Ultimate 1.25\" filter\u003c\/strong\u003e is a \u003cstrong\u003edual band ultra-narrow 3nm filter\u003c\/strong\u003e, a direct evolution of the well-known L-eXtreme. Designed for those who want maximum \u003cstrong\u003elight pollution suppression\u003c\/strong\u003e, it isolates with extreme precision the \u003cstrong\u003eH-Alpha (656.3nm)\u003c\/strong\u003e and \u003cstrong\u003eOIII (500.7nm)\u003c\/strong\u003e emission lines, bringing out even the faintest nebulae and enhancing the finest details.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e3nm bandpass\u003c\/strong\u003e makes the L-Ultimate the ideal choice for astrophotographers working from \u003cstrong\u003eurban and suburban areas\u003c\/strong\u003e with \u003cstrong\u003eDSLR, CMOS (mono or color) or CCD cameras\u003c\/strong\u003e, allowing imaging sessions even under heavy light pollution. It shares build quality and coating with the rest of the Optolong range and can also be used on fast focal ratios down to about f\/4.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e3nm\u003c\/strong\u003e bandpass: maximum suppression of every artificial light source\u003c\/li\u003e\n\u003cli\u003eOptimized transmission on the H-Alpha and OIII lines\u003c\/li\u003e\n\u003cli\u003eCompatible with focal ratios down to about \u003cstrong\u003ef\/4\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eUsable with DSLR, mono\/color CMOS and CCD\u003c\/li\u003e\n\u003cli\u003eCompact 1.25\" format, ideal for lightweight setups and eyepiece trains\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFilter type\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDual Narrowband (H-Alpha + OIII)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eBandpass\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e3nm (Ha 656.3nm + OIII 500.7nm)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eFormat\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e1.25\" (31.8mm)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSubstrate\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eSchott optical glass\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eSurface quality\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e60\/40 (MIL-O-13830)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRecommended focal ratio\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDown to f\/4\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eRecommended use\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eDSLR, mono\/color CMOS, CCD\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eThe Optolong L-Ultimate 1.25\" filter is the most advanced solution for emission astrophotography from compromised skies in a compact format, ideal for anyone using 1.25\" eyepieces and optical trains.\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":58557643489611,"sku":"OPL-ULTIMATE-125","price":275.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/Optolong-Filtro-L-Ultimate-1-25.jpg?v=1790069766","url":"https:\/\/adriasky.it\/en\/products\/optolong-l-ultimate-filter-125-in","provider":"Adriasky","version":"1.0","type":"link"}