{"product_id":"svbony-sv223-2-clicklock-dielectric-mirror-diagonal","title":"SVBONY SV223 2″ 90° Clicklock Dielectric Mirror Diagonal","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385870419614457549257247.jpg?v=1791667835\" alt=\"SVBONY SV223 2 inch 90 degree dielectric mirror diagonal\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SVBONY SV223 2″ is a 90° mirror star diagonal with a dielectric-coated mirror rated at more than 99% reflectivity and 1\/10λ flatness on an 11.5 mm thick substrate. A Clicklock clamp holds 2″ eyepieces and accessories, a 2″-to-1.25″ adapter is included, and the telescope-side barrel carries an M48 x 0.75 filter thread. Clear aperture is 43 mm, optical length is approximately 109.1 mm, and it weighs 573.7 g.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385870426108640766781949.jpg?v=1791667835\" alt=\"SVBONY SV223 2 inch 90 degree viewing angle\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you observe through a refractor, SCT or Maksutov with a 2″ focuser or visual back and want a comfortable viewing angle, a secure grip on heavy 2″ eyepieces, and the option to use 1.25″ eyepieces through the same diagonal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDielectric mirror, \u0026gt;99% reflectivity:\u003c\/strong\u003e 1\/10λ flatness on an 11.5 mm thick substrate for a stable, flat reflecting surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClicklock clamp:\u003c\/strong\u003e a twist-to-lock clamp that centres and holds 2″ eyepieces or accessories quickly and securely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e43 mm clear aperture:\u003c\/strong\u003e passes the full field of wide 2″ eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompression rings:\u003c\/strong\u003e stainless steel compression rings on both the diagonal and the adapter help prevent barrels from marring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM48 x 0.75 filter thread:\u003c\/strong\u003e on the telescope-side barrel for 2″ filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal construction:\u003c\/strong\u003e 573.7 g.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385870421862665058543660.jpg?v=1791667835\" alt=\"SVBONY SV223 2 inch Clicklock locking mechanism\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385870423083016402927862.jpg?v=1791667835\" alt=\"SVBONY SV223 2 inch high-reflectivity dielectric mirror\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385870425031691949714654.jpg?v=1791667835\" alt=\"SVBONY SV223 2 inch compression ring\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual observing\u003c\/strong\u003e with refractors and catadioptric telescopes, from wide-field deep-sky sweeps to high-power planetary views.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy 2″ eyepieces\u003c\/strong\u003e and zoom eyepieces that benefit from a secure clamp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixed eyepiece collections\u003c\/strong\u003e, using the included 2″-to-1.25″ adapter.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385870427886372636544287.jpg?v=1791667835\" alt=\"SVBONY SV223 2 inch before and after use comparison\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope side:\u003c\/strong\u003e 2″ barrel, fits 2″ focusers and visual backs; M48 x 0.75 thread for 2″ filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepiece side:\u003c\/strong\u003e 2″ Clicklock clamp; 1.25″ eyepieces fit with the included adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical length:\u003c\/strong\u003e approximately 109.1 mm, worth accounting for when reaching focus on refractors with limited inward travel.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385870428911309512628163.jpg?v=1791667835\" alt=\"SVBONY SV223 2 inch diagonal with 1.25 inch adapter\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhat's in the Box\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSV223 2″ 90° Clicklock dielectric diagonal\u003c\/li\u003e\n\u003cli\u003e2″ to 1.25″ adapter\u003c\/li\u003e\n\u003cli\u003eM4 screw (1)\u003c\/li\u003e\n\u003cli\u003eDust cap (1)\u003c\/li\u003e\n\u003cli\u003eDust plug (1)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImage orientation:\u003c\/strong\u003e the view is upright but mirror-reversed left to right, as with any single-mirror diagonal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual use:\u003c\/strong\u003e a diagonal is for eyepiece observing; imaging cameras usually attach straight-through.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight path:\u003c\/strong\u003e the 109.1 mm optical length adds to the focus position. If you are unsure whether your telescope reaches focus with a 2″ diagonal, send us the model and we will check it with you.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo. Insert the 2″ barrel into your focuser or visual back, then insert an eyepiece and twist the Clicklock ring to lock it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 1.25″ eyepieces?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes. The included 2″-to-1.25″ adapter fits into the Clicklock clamp.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it take filters?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes. 2″ filters thread onto the M48 x 0.75 telescope-side barrel, so one filter serves every eyepiece.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy a dielectric mirror?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDielectric coatings reflect more than 99% of the light and are more durable than standard aluminium coatings.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 2″ 90° dielectric mirror diagonal with \u0026gt;99% reflectivity, a Clicklock eyepiece clamp, a 43 mm clear aperture and a 1.25″ adapter included.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"Default Title","offer_id":67721428828271,"sku":"W9180B","price":153.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/w9180b-1_20250807165619_0071.jpg?v=1791665258","url":"https:\/\/ontariotelescope.com\/products\/svbony-sv223-2-clicklock-dielectric-mirror-diagonal","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}