{"product_id":"sky-watcher-quattro-250p-10-imaging-newtonian-with-free-pre-installed-zwo-eaf-s11220-pre-owned","title":"Sky-Watcher Quattro 250P 10\" Imaging Newtonian with Free Pre-installed ZWO EAF! - S11220 (Pre-owned)","description":"\u003cp\u003e\u003cspan style=\"color: rgb(245, 15, 15);\"\u003e\u003cstrong\u003eUsed, in excellent condition.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(245, 15, 15);\"\u003e\u003cstrong\u003eIncludes ZWO EAF \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e254mm aperture, 1000mm focal length \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFast f\/4 focal ratio\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eParabolic mirror designed for imaging with 94% reflectivity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e10:1, dual-speed, 2-inch Crayford-style focuser\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOversized secondary mirror produces greater illumination for full-frame DSLR and CCD cameras\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTube rings, mounting plate, eyepiece adapters, and 9x50 finder scope included\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Sky-Watcher Quattro Imaging Newtonian with dual-speed focuser incorporates a superb mirror-set with two significant advantages over competing products. A 2\" dual-speed 10:1 ratio focuser is included for excellent focusing precision. Additionally, the tube length has been slightly shortened to optimize performance for prime-focus photography.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\n\u003ctable class=\"spec-table\" style=\"width: 100%; height: 682.189px;\"\u003e\n\u003cthead class=\"hide-thead\"\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eS11220\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eUPC\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e050234112208\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 64.2355%; height: 19.5938px;\"\u003eOptical Info\u003c\/th\u003e\n\u003cth style=\"width: 32.9073%; height: 19.5938px;\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 13.7969px;\"\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eNewtonian\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eMirror Coatings\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e94% Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eGlass Type\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eBorosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eTrue Aperture (mm)\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e257\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003ePrimary Aperture (mm)\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e254\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eF\/Ratio\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eFocal Length (mm)\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e1000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eSecondary Diameter\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e89mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eSecondary Obstruction (by diameter)\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e35%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eSecondary Obstruction by Area\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e12%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 64.2355%; height: 19.5938px;\"\u003eObservational Info\u003c\/th\u003e\n\u003cth style=\"width: 32.9073%; height: 19.5938px;\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 13.7969px;\"\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eDawes Limit\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e0.46\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eRayleigh Limit\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e0.55\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eLimiting Mag.\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e14.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eMinimum Magnification\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eMaximum Magnification\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eLight Gathering (compared to next size down)\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e57%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 64.2355%; height: 19.5938px;\"\u003eGeneral Info\u003c\/th\u003e\n\u003cth style=\"width: 32.9073%; height: 19.5938px;\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 13.7969px;\"\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e2\" Dual Speed Crayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eOTA Length (Retract\/Ext.)\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e36.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eOTA Outer Diameter\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e11.375\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eOTA Weight (with accessories)\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003e36.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003cth style=\"width: 64.2355%; height: 19.5938px;\"\u003eAccessories\u003c\/th\u003e\n\u003cth style=\"width: 32.9073%; height: 19.5938px;\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 13.7969px;\"\u003e\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eIncluded Finder\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eIncluded Diagonal\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eMounting Accessories\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eRings\/V-Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eIncluded Eyepieces\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eIncluded Case\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 64.2355%; height: 19.5938px;\"\u003eCorrector\u003c\/td\u003e\n\u003ctd style=\"width: 32.9073%; height: 19.5938px;\"\u003eNo (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Sky-Watcher USA","offers":[{"title":"Default Title","offer_id":43619844358257,"sku":"USED070701","price":995.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/20260707_163552.jpg?v=1783457168","url":"https:\/\/khanscope.com\/products\/sky-watcher-quattro-250p-10-imaging-newtonian-with-free-pre-installed-zwo-eaf-s11220-pre-owned","provider":"Khan Scope Centre","version":"1.0","type":"link"}