{"product_id":"celestron-edgehd-11-ota-91050-xlt-u-used","title":"Celestron EdgeHD 11 OTA (91050-XLT-U) - USED","description":"\u003ch1\u003eCelestron EdgeHD 11 OTA - USED\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan style=\"color: rgb(248, 13, 13);\"\u003e\u003cstrong\u003eTUBE ONLY\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSee the Universe in HD\u003c\/strong\u003e Celestron EdgeHD 11 OTA is an aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma; it also provides an astrograph-quality flat focal plane all the way to the edge of the field of view.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrue Astrograph Quality\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMany optical designs that advertise themselves as \"astrographs\" actualy only produce pinpoint stars across a curved focal plane. While this may be acceptable for some visual observing, stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuperior edge performance not only creates rounder, more pleasing stars, but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. With Celestron’s StarBright XLT optical coatings on every surface, EdgeHD optics gives you maximum light throughput across the widest visual and photographic spectrum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMechanical Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003eIn addition to EdgeHD’s optimized optical design, the telescope tube has been redesigned to make sure you get the most from your optics each and every night.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror clutches\u003c\/strong\u003e - Flexible tension clutches hold the mirror in place and reduce image shift when taking long exposure astro-images. Once focused, the flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly, keeping the image centered in the eyepiece (or on the sensor).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube vents\u003c\/strong\u003e - Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 50-mesh filter guaranteed to let warm air out without letting dust in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastar versatility\u003c\/strong\u003e - EdgeHD is the most versatile imaging telescope available today. At its native f\/10, you can achieve the image scale necessary to capture the smallest of deep sky objects. Add the optional reducer lens—custom-designed for your size EdgeHD tube—and you can increase your field of view without sacrificing optical performance. A Barlow gives you added power for high-resolution planetary, lunar and solar imaging. All EdgeHD optical tubes are Fastar-compatible, allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f\/2 wide field imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIndividually Tested\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvery EdgeHD that ships has been tested not only for the surface quality of each optical component, but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. This “final acceptance test” confirms the EdgeHD will perform in the field and deliver high-quality astroimages.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExperience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eAluminum optical tube with tube vents featuring an integrated 50-mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eVersatile design accommodates 3 focal ratios: native f\/10, f\/7 with the addition of a focal reducer, or ultra-fast f\/2 imaging with a removable secondary mirror and third-party accessories\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eCelestron’s premium StarBright XLT coatings provide maximum light transmission.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eA 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2\" eyepiece are all included\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"box-sizing: inherit; border-collapse: collapse; border-spacing: 0px; text-align: left; width: 1200px; color: rgb(51, 62, 72); font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; height: 1039px;\" id=\"product-specs-list\" class=\"table-open\"\u003e\n\u003cthead style=\"box-sizing: inherit;\"\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 0px; height: 50px;\"\u003e\n\u003cth style=\"box-sizing: inherit; padding: 13px; font-size: 16px; height: 50px; background-color: #f6f7f9; font-weight: bold; text-transform: uppercase;\"\u003eOPTICAL TUBE INFO:\u003c\/th\u003e\n\u003cth style=\"box-sizing: inherit; padding: 13px; font-size: 16px; height: 50px; background-color: #f6f7f9; font-weight: bold; text-transform: uppercase;\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody style=\"box-sizing: inherit;\" id=\"spec-block-1\"\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eOptical Design:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eEdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eAperture:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e279.4mm (11\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eFocal Length:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e2800mm (110\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eFocal Ratio:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003ef\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eFocal Length of Eyepiece 1:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e23mm (0.91\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eMagnification of Eyepiece 1:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e122x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eFinderscope:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eStar Diagonal:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e2\" with 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eOptical Tube:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eHighest Useful Magnification:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e660x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eLowest Useful Magnification:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e40x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eLimiting Stellar Magnitude:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eResolution (Rayleigh):\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e0.5 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eResolution (Dawes):\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e0.42 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eLight Gathering Power (Compared to human eye):\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e1593x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eSecondary Mirror Obstruction:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e95mm (3.75\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eSecondary Mirror Obstruction by Diameter:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e34%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eSecondary Mirror Obstruction by Area:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e12%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eOptical Coatings:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eOptical Tube Length:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e610mm (24\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eOptical Tube Diameter:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e312.42mm (12.3\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid rgb(228, 232, 234); height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eOptical Tube Weight:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e28 lbs (13 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 0px; height: 43px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eDovetail:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCelestron EdgeHD 11 OTA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e* Mount not included*\u003c\/strong\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":47611747074277,"sku":"CEL-91050-XLT-U","price":4000.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/20250310_110609.jpg?v=1777043736","url":"https:\/\/astronomyplus.com\/products\/celestron-edgehd-11-ota-91050-xlt-u-used","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}