{"product_id":"svbony-sv216-2x-barlow-lens","title":"SVBONY SV216 1.25″ 2x 4-Element Barlow Lens","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6380774842646269565987197.jpg?v=1791669909\" alt=\"SVBONY SV216 1.25 inch 2x 4-element Barlow lens key visual\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SVBONY SV216 2x is a 1.25″ Barlow lens with a four-element optical design that doubles the effective focal length of your telescope, and therefore the magnification of any eyepiece placed behind it. All four elements are fully multi-coated and edge-blackened. The upper body is 59.5 mm long, the barrel inserts 39.5 mm into the focuser, the stainless steel barrel carries an M28.5 x 0.6 filter thread, and the whole unit weighs 219 g (7.72 oz).\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6380774844138618533782854.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens feature panel\" 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 or image the Moon and planets and want more magnification from the eyepieces you already own, or if you are building a 1.25″ eyepiece set and want each eyepiece to cover two magnifications.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2x magnification factor:\u003c\/strong\u003e a 20 mm eyepiece behaves like a 10 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-element design:\u003c\/strong\u003e SVBONY specifies good control of chromatic and spherical aberration and a flatter field than standard Barlows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated, edge-blackened lenses:\u003c\/strong\u003e reduce internal reflections and scattered light for contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-screw lock with compression ring:\u003c\/strong\u003e three M3 x 10 thumbscrews and a compression band hold the eyepiece centred without marking the barrel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless steel straight barrel:\u003c\/strong\u003e 1.25″, with M28.5 x 0.6 filter threads.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6380842317510312614385353.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens 4-element optical design\" 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\/6380774848304197857408521.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens fully multi-coated elements\" 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\/6380774849692321838539095.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens edge-blackened lenses\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA Barlow is a negative lens group placed ahead of the focal plane that lengthens the converging light cone, increasing the effective focal length. The SV216 uses four elements rather than the two found in basic Barlows, which gives the designer room to correct colour and spherical error and to keep the field flatter. SVBONY also notes that the eyepiece's eye relief is preserved when used with the Barlow, so short-focus magnifications stay comfortable to view through.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6380774851695557947002276.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens stainless steel barrel detail\" 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\/6380774852841751843213424.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens three-screw eyepiece locking\" 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\/6380774854241045847645441.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens 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\u003eLunar and planetary observing:\u003c\/strong\u003e doubles magnification for craters, Jupiter's belts and Saturn's rings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlanetary imaging:\u003c\/strong\u003e lengthens focal length ahead of a small-pixel planetary camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble stars:\u003c\/strong\u003e higher image scale for splitting close pairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtending an eyepiece set:\u003c\/strong\u003e each 1.25″ eyepiece gains a second magnification.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6380842320151112639826289.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens use with eyepiece and camera\" 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\u003eFocuser:\u003c\/strong\u003e fits any 1.25″ focuser or diagonal; insertion depth 39.5 mm, maximum diameter 44 mm excluding thumbscrew.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepieces and cameras:\u003c\/strong\u003e accepts 1.25″ eyepieces or 1.25″-nosepiece cameras; SVBONY notes it can sit anywhere between the eyepiece and the camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilters:\u003c\/strong\u003e M28.5 x 0.6 thread for standard 1.25″ filters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6380774857019057177924393.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens M28.5 filter thread\" 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\/6380774858393671024815719.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens dimensions\" 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\/6380774859559304746639675.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens specifications panel\" 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\u003e1 x SV216 4-element 2x 1.25″ Barlow lens\u003c\/li\u003e\n\u003cli\u003e1 x Bolt Cases storage box\u003c\/li\u003e\n\u003cli\u003e3 x M3 screws\u003c\/li\u003e\n\u003cli\u003e1 x dust plug\u003c\/li\u003e\n\u003cli\u003e1 x end cap\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6380774860599838391345077.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens Bolt Cases storage box\" 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\/6380842321566026094792807.jpg?v=1791669909\" alt=\"SVBONY SV216 2x Barlow lens package contents\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25″ only:\u003c\/strong\u003e the barrel and eyepiece holder are 1.25″. 2″ eyepieces need a 2″ Barlow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnification and seeing:\u003c\/strong\u003e doubling magnification also doubles the effect of atmospheric turbulence, so the highest powers are best kept for steady nights.\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. It slides into the focuser or diagonal like an eyepiece, and the eyepiece then slides into the Barlow and locks with the three thumbscrews.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it with a camera?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes. A camera with a 1.25″ nosepiece fits the eyepiece holder, which is a common setup for planetary imaging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it take filters?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes. The barrel has an M28.5 x 0.6 thread for standard 1.25″ filters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is it different from the SV216 3x?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 2x doubles magnification and has a stainless steel barrel at 219 g. The 3x triples it and has an aluminium barrel at 173 g.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a four-element, fully multi-coated 1.25″ 2x Barlow with a three-screw lock and filter threads that doubles the magnification of your eyepieces for Moon, planets and double stars.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"Default Title","offer_id":67722235871343,"sku":"W9168A","price":71.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/w9168a_20250806152205_2001_20260810154741_5251.webp?v=1791670155","url":"https:\/\/ontariotelescope.com\/products\/svbony-sv216-2x-barlow-lens","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}