{"product_id":"used-c11-a-xlt-optical-tube-assembly","title":"USED - C11-A XLT Optical Tube Assembly","description":"\u003ch2\u003eUSED GEAR INFORMATION\u003c\/h2\u003e\n\u003cp\u003eThis telescope is in great condition. The previous owner has taken great care of it and only used it a small number of times. The optical surfaces appear excellent. All original accessories are included. Original shipping materials are included as well. OTA only, mount not included.\u003c\/p\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e11\" Schmidt-Cassegrain Optical Tube Assembly\u003c\/li\u003e\n\u003cli\u003eAluminum Optical Tube\u003c\/li\u003e\n\u003cli\u003eCelestron's premium StarBright XLT coatings\u003c\/li\u003e\n\u003cli\u003e2800 mm focal length (f\/10)\u003c\/li\u003e\n\u003cli\u003e40 mm eyepiece included (70x)\u003c\/li\u003e\n\u003cli\u003eVisual back allows for use with 1.25\" accessories\u003c\/li\u003e\n\u003cli\u003e9x50 finderscope to help accurately find objects\u003c\/li\u003e\n\u003cli\u003eStar diagonal provides more comfortable viewing position when observing objects that are high in the sky\u003c\/li\u003e\n\u003cli\u003eIncludes choice of D-Style dovetail rail compatible with CGE mount, or V-Style \u003cspan\u003edovetail rail compatible with CG-5 Advanced Series mount\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e11\" Schmidt-Cassegrain Optical Tube Assembly\u003c\/li\u003e\n\u003cli\u003eAluminum Optical Tube\u003c\/li\u003e\n\u003cli\u003eCelestron's premium StarBright XLT coatings\u003c\/li\u003e\n\u003cli\u003e2800 mm focal length (f\/10)\u003c\/li\u003e\n\u003cli\u003e40 mm eyepiece included (70x)\u003c\/li\u003e\n\u003cli\u003eVisual back allows for use with 1.25\" accessories\u003c\/li\u003e\n\u003cli\u003e9x50 finderscope to help accurately find objects\u003c\/li\u003e\n\u003cli\u003eStar diagonal provides more comfortable viewing position when observing objects that are high in the sky\u003c\/li\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003cli\u003eIncludes choice of D-Style dovetail rail compatible with CGE mount, or V-Style \u003cspan\u003edovetail rail compatible with CG-5 Advanced Series mount\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eSchmidt-Cassegrain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture (mm)\u003c\/td\u003e\n\u003ctd\u003e279.4 mm (11\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2800 mm (110\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 1 (mm)\u003c\/td\u003e\n\u003ctd\u003e40 mm (1.57\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 1\u003c\/td\u003e\n\u003ctd\u003e70x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e660x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e40x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.5 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.42 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye)\u003c\/td\u003e\n\u003ctd\u003e1593x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e95 mm (3.75\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction by Diameter\u003c\/td\u003e\n\u003ctd\u003e34%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction by Area\u003c\/td\u003e\n\u003ctd\u003e12%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright \/ XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e610 mm (24\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e27.5 lbs (12 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Compatibility\u003c\/td\u003e\n\u003ctd\u003eCGE Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"CGE","offer_id":48423512047865,"sku":"USED-91036-XLT","price":2499.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/20260520_114644.jpg?v=1779302946","url":"https:\/\/cloudbreakoptics.com\/products\/used-c11-a-xlt-optical-tube-assembly","provider":"Cloud Break Optics","version":"1.0","type":"link"}