{"product_id":"celestron-deluxe-off-axis-guider-precision-guiding-for-astroimaging","title":"Celestron Deluxe Off-Axis Guider - Precision Guiding for Astroimaging","description":"\u003cp\u003eIn this review the Celestron Deluxe Off-Axis Guider is examined as a precision accessory for serious astroimagers using Schmidt-Cassegrain and EdgeHD telescopes. The bottom line: this guider is for photographers who need the most accurate way to guide without the differential flexure of a separate guide scope. Its 12.5mm multi-coated prism and 48mm clear aperture deliver a bright pickoff and support full-frame imaging while included adapters simplify spacing for DSLR and common CCD cameras. Expect improved guiding precision and tighter, rounder stars when used with compatible setups.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrism pickoff:\u003c\/strong\u003e The 12.5mm multi-coated prism with aluminized backing provides maximum reflectivity to the autoguider, producing a bright guide star for accurate corrections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge aperture:\u003c\/strong\u003e The 48mm clear aperture supports full frame cameras without vignetting, so the guider does not compromise the imaging field for most sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed-orientation focuser:\u003c\/strong\u003e The helical focuser gives smooth, repeatable adjustments so the autoguider can be brought to precise focus quickly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect spacing adapters:\u003c\/strong\u003e Included adapters are sized for DSLR, Nightscape CCD and other common astroimaging cameras, ensuring the guider sits at the proper flange distance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSCT compatibility:\u003c\/strong\u003e Designed with Schmidt-Cassegrain and EdgeHD telescopes in mind, it integrates cleanly with longer focal length optical trains used for deep-sky imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Deluxe Off-Axis Guider is aimed at intermediate and advanced astrophotographers who use long focal length SCT or EdgeHD scopes and need the most accurate guiding possible for long exposures. It benefits anyone who wants to eliminate guide-scope flexure and achieve pinpoint round stars by guiding from the exact focal plane.\u003c\/p\u003e\u003cp\u003eLess experienced users who want a plug-and-play solution might find the small field of view and the fiddly process of locating guide stars more challenging, and those needing extreme durability in every mechanical detail should be aware of some user reports about thumb screw breakage and mixed impressions of the focuser.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAccurate guiding by using a prism to sample the same focal plane as the imaging camera, reducing flexure errors.\u003c\/li\u003e\n\u003cli\u003eLarge 48mm clear aperture that supports full-frame cameras without vignetting.\u003c\/li\u003e\n\u003cli\u003eGood build quality and a useful selection of adapters for DSLR and popular CCD cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSome users report mixed feelings about the helical focuser's feel and a few instances of broken thumb screws, which may affect perceived sturdiness.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism size\u003c\/td\u003e\n\u003ctd\u003e12.5mm multi-coated prism\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism backing\u003c\/td\u003e\n\u003ctd\u003eAluminized backing for high reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear aperture\u003c\/td\u003e\n\u003ctd\u003e48mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser type\u003c\/td\u003e\n\u003ctd\u003eFixed-orientation helical focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapters included\u003c\/td\u003e\n\u003ctd\u003eAdapters for DSLR, Nightscape CCD and other astroimaging cameras\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIdeal telescopes\u003c\/td\u003e\n\u003ctd\u003eSchmidt-Cassegrain and EdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Celestron Deluxe Off-Axis Guider is a practical, well-spec'd solution for astrophotographers who need accurate guiding without a separate guide scope. It offers a large clear aperture, effective prism pickoff and helpful adapters that deliver value to SCT and EdgeHD users, though a few mechanical details could be more robust. For those prioritizing guiding precision and image quality, it is a worthwhile addition to an astroimaging toolkit.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this cause vignetting on full-frame cameras?\u003c\/strong\u003e\u003cbr\u003eWith its 48mm clear aperture the guider is designed to support full-frame cameras without vignetting in most setups.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it include spacing for common DSLR and CCD cameras?\u003c\/strong\u003e\u003cbr\u003eYes, the package includes adapters with the correct spacing for DSLR, Nightscape CCD and other popular astroimaging cameras.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs it compatible with Schmidt-Cassegrain telescopes?\u003c\/strong\u003e\u003cbr\u003eYes, it is ideal for Schmidt-Cassegrain and EdgeHD telescopes and integrates with long focal length optical trains.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":48263542341851,"sku":"B00DSXW5OU","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51qAoWHlJ1L._AC_SL1200.jpg?v=1776600985","url":"https:\/\/gearmusthave.com\/products\/celestron-deluxe-off-axis-guider-precision-guiding-for-astroimaging","provider":"GearMustHave","version":"1.0","type":"link"}