{"product_id":"celestron-riduttore-correttore-f63-schmidt-cassegrain","title":"Celestron f\/6.3 Reducer\/Corrector for Schmidt-Cassegrain","description":"\u003cp\u003eThe \u003cstrong\u003eCelestron f\/6.3 Reducer\/Corrector\u003c\/strong\u003e (item 94175) is the reference optical accessory for \u003cstrong\u003eastrophotography with Schmidt-Cassegrain telescopes\u003c\/strong\u003e. Its 4-element optical design combines a focal reducer, field flattener and coma corrector in a single unit, turning any \u003cstrong\u003eCelestron SCT from 5″ to 14″\u003c\/strong\u003e into a dual-focal-length instrument of outstanding versatility, without compromising image quality.\u003c\/p\u003e\n\n\u003ch3\u003eFocal Reduction and Increased Luminosity\u003c\/h3\u003e\n\u003cp\u003eMounted on the C5, C6, C8, C9¼ and C11, the reducer brings the native focal ratio down to \u003cstrong\u003ef\/6.3\u003c\/strong\u003e; on the C14 it achieves f\/7. The \u003cstrong\u003e0.63× reduction factor\u003c\/strong\u003e increases the photographic speed, cutting \u003cstrong\u003eexposure times by a factor of 3\u003c\/strong\u003e compared to the native focus — a decisive advantage in deep-sky imaging sessions where every minute of exposure matters.\u003c\/p\u003e\n\n\u003ch3\u003e4-Element Optical Design and Broadband Multi-Coating\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e4-element optical design\u003c\/strong\u003e simultaneously corrects coma, field curvature and residual spherical aberration of the SCT optics. \u003cstrong\u003eBroadband multi-layer coatings\u003c\/strong\u003e maximize light transmission across the full visible spectrum, preserving contrast in both broadband and narrowband imaging sessions.\u003c\/p\u003e\n\n\u003ch3\u003eWider Field for Every Celestial Object\u003c\/h3\u003e\n\u003cp\u003eThe shorter equivalent focal length widens the field of view with any sensor — from small planetary CMOS imagers to full-frame DSLRs — making it more efficient to capture extended nebulae, open clusters and spiral galaxies that require a larger angular field.\u003c\/p\u003e\n\n\u003ch3\u003eUniversal Connection to All Celestron SCTs\u003c\/h3\u003e\n\u003cp\u003eThe reducer\/corrector threads directly onto the rear port of all Celestron SCTs via \u003cstrong\u003e2\"-24 M\/F\u003c\/strong\u003e threads on both sides, with a telescope-side \u003cstrong\u003eT2 (M42 × 0.75)\u003c\/strong\u003e connection. \u003cstrong\u003eNote:\u003c\/strong\u003e the 94175 is not optically compatible with \u003cstrong\u003eCelestron Edge HD\u003c\/strong\u003e systems; use the dedicated 0.7× reducer for those instruments.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\u003cth\u003eParameter\u003c\/th\u003e\u003cth\u003eValue\u003c\/th\u003e\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\u003ctd\u003eOptical design\u003c\/td\u003e\u003ctd\u003eFocal reducer + field flattener + coma corrector, 4 elements\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eOptical coatings\u003c\/td\u003e\u003ctd\u003eBroadband multi-layer\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eReduction factor\u003c\/td\u003e\u003ctd\u003e0.63×\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eResulting focal ratio\u003c\/td\u003e\u003ctd\u003ef\/6.3 (C5–C11) \/ f\/7 (C14)\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eThread connection\u003c\/td\u003e\u003ctd\u003e2\"-24 M\/F on both sides\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\u003ctd\u003eT2 – M42 × 0.75 mm\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eExposure time reduction\u003c\/td\u003e\u003ctd\u003eFactor 3×\u003c\/td\u003e\u003c\/tr\u003e\n    \u003ctr\u003e\u003ctd\u003eCompatibility\u003c\/td\u003e\u003ctd\u003eCelestron SCT 5″, 6″, 8″, 9¼″, 11″, 14″ — NOT compatible with Edge HD\u003c\/td\u003e\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":57442514862411,"sku":"CSCE94175","price":183.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/94175_reducercorrecto_large_11.jpg?v=1779774684","url":"https:\/\/adriasky.it\/en\/products\/celestron-reducer-corrector-f63-schmidt-cassegrain","provider":"Adriasky","version":"1.0","type":"link"}