{"title":"SVBONY Barlow Lenses","description":"\u003cp\u003eSVBONY's 1.25-inch Barlows include the 4-element SV216 2x, the SV136 3x, the SV137 FMC Barlow with brass ring, and a 2x Barlow with M42 threads for attaching a camera. Part of \u003ca href=\"\/collections\/eyepiece-barlows\"\u003eBarlows \u0026amp; Focal Extenders\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"svbony-f9108a-2x-barlow-lens","title":"SVBONY 2x Barlow Lens 1.25″ with M42 Threads","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1_20250806112505_9310_20260820165422_3718.webp?v=1791670001\" alt=\"SVBONY F9108A 1.25″ 2x Barlow lens with M42 threads\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SVBONY F9108A is a 1.25″ (31.7 mm) 2x Barlow lens. It slides into a 1.25″ focuser or diagonal, accepts a 1.25″ eyepiece on top, and doubles the magnification that eyepiece gives on your telescope. The optics are optical glass with a multilayer broadband green coating, set in a black metal housing 7.5 cm (2.95″) long, with an M42 x 0.75 thread for camera use.\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 the Moon and planets visually and want more magnification from the eyepieces you already own, or if you want a simple way to extend focal length for lunar and planetary imaging with an M42-threaded camera adapter.\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, effectively doubling your eyepiece set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultilayer broadband coating:\u003c\/strong\u003e applied to the optical glass to keep light loss low and contrast high.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-metal housing:\u003c\/strong\u003e black metal body, 7.5 cm long.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 1.25″ barrel:\u003c\/strong\u003e fits 1.25″ focusers, diagonals and eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM42 x 0.75 thread:\u003c\/strong\u003e lets the Barlow connect into an M42 (T2) camera train.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eA Barlow is a negative lens placed ahead of the focal plane. It lengthens the effective focal length of the telescope, so a 1000 mm telescope works as roughly 2000 mm with this lens at its rated position. Because the focal ratio doubles as well, image scale doubles for a camera and magnification doubles for an eyepiece, while eye relief and the eyepiece's apparent field are largely unchanged.\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 higher magnification on the Moon, Jupiter, Saturn and Mars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble stars:\u003c\/strong\u003e extra power for splitting close pairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlanetary imaging:\u003c\/strong\u003e longer effective focal length for a larger image scale with an M42-threaded camera.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarrel:\u003c\/strong\u003e 1.25″ (31.7 mm) for 1.25″ focusers and diagonals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepieces:\u003c\/strong\u003e accepts standard 1.25″ eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera use:\u003c\/strong\u003e M42 x 0.75 thread for M42\/T2 camera adapters.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf you are pairing it with a specific camera or adapter, send us your setup and we will confirm the connection with you.\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\u003eMagnification is limited by conditions:\u003c\/strong\u003e doubling power also enlarges atmospheric turbulence, so the highest combinations work best on steady nights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25″ only:\u003c\/strong\u003e it does not accept 2″ eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e SVBONY does not publish a weight for this Barlow.\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 goes into the focuser or diagonal like an eyepiece, and your eyepiece goes into the top of the Barlow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does 2x mean in practice?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEach eyepiece gives twice its usual magnification. A 25 mm eyepiece on a 1000 mm telescope gives 40x on its own and 80x with the Barlow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it for photography?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes. The M42 x 0.75 thread lets it sit in an M42-threaded camera train for lunar and planetary imaging.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a compact 1.25″ 2x Barlow with multi-coated optics and an M42 thread, doubling the magnification of your existing eyepieces for lunar and planetary work.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"Default Title","offer_id":67722200940655,"sku":"F9108A","price":21.38,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1_20250806112505_9310_20260820165422_3718.webp?v=1791670001"},{"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"},{"product_id":"svbony-sv137-barlow-lens","title":"SVBONY SV137 1.25″ FMC Barlow Lens with Brass Ring","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385769438598811717601242.jpg\" alt=\"SVBONY SV137 1.25 inch 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 SV137 is a 1.25″ Barlow lens that multiplies the magnification of the eyepiece placed in it — this listing is the 3x version (item W9106D). It uses a fully multi-coated cemented lens group with blackened edges, a CNC-machined aluminium body with matte-painted interior, and an internal brass ring that holds the eyepiece without scratching its barrel. It weighs 96 g and comes with a pair of dust covers.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385769438631552449398478.jpg\" alt=\"SVBONY SV137 Barlow lens multi-coated optics\" 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 with 1.25″ eyepieces and want more magnification on the Moon, planets and double stars without buying additional short-focal-length eyepieces. A 3x Barlow effectively triples your eyepiece collection: a 15 mm eyepiece behaves like a 5 mm.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3x magnification:\u003c\/strong\u003e triples the effective focal length of the telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated, cemented lens group:\u003c\/strong\u003e for light transmission and sharpness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlackened lens edges and matte interior:\u003c\/strong\u003e to reduce stray light and reflections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal brass ring:\u003c\/strong\u003e clamps the eyepiece barrel without marking it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge locking nut and anti-slip ring:\u003c\/strong\u003e quick eyepiece insertion and a secure grip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC aluminium body, 96 g:\u003c\/strong\u003e light and compact.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385769438662760719334409.jpg\" alt=\"SVBONY SV137 Barlow lens internal brass ring\" 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\/6385769438693453082302011.jpg\" alt=\"SVBONY SV137 Barlow lens CNC aluminium body\" 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 placed ahead of the focal plane. It lengthens the telescope's effective focal length — here by three times — so every eyepiece gives three times the magnification. Because it also raises the effective focal ratio, it lets longer-focal-length eyepieces with more comfortable eye relief reach planetary magnifications. The SV137's lens group is fully multi-coated and edge-blackened to keep contrast at high power.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlanetary observing:\u003c\/strong\u003e Jupiter's belts, Saturn's rings and Mars at higher power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLunar detail:\u003c\/strong\u003e craters and rilles near the terminator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble stars:\u003c\/strong\u003e splitting close pairs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepieces:\u003c\/strong\u003e fits 1.25″ eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocuser:\u003c\/strong\u003e inserts into a 1.25″ focuser or diagonal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOther versions:\u003c\/strong\u003e SVBONY also lists 2x (W9106A, 90 g), 2x-M42 and bundle versions of the SV137; contact us if you need one of those.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385769438722349403913345.jpg\" alt=\"SVBONY SV137 Barlow lens product views\" 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\u003eSV137 1.25″ 3x Barlow lens\u003c\/li\u003e\n\u003cli\u003ePair of dust covers\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\u003eMagnification has a ceiling:\u003c\/strong\u003e the atmosphere and your telescope's aperture set the useful maximum, so a 3x Barlow works best with medium and longer-focal-length eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25″ only:\u003c\/strong\u003e it does not accept 2″ eyepieces.\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 Barlow into your focuser or diagonal, put the eyepiece into the Barlow, tighten the locking nut and refocus.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich eyepieces work best with a 3x Barlow?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMedium to long focal lengths — roughly 12 mm to 25 mm — give planetary magnifications while keeping comfortable eye relief.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it scratch my eyepieces?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe internal brass ring is there to hold eyepiece barrels without marking them.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it for imaging?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis listing is the 3x version for 1.25″ eyepieces. SVBONY also lists 2x, 2x-M42 and bundle versions; get in touch and we will confirm which suits your setup.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 96 g, fully multi-coated 1.25″ 3x Barlow with a brass compression ring — a simple way to triple the magnification of the eyepieces you already own.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"3x","offer_id":67722236330095,"sku":"W9106D","price":22.06,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/w9106_20250806141232_3623_20260810140540_9948.webp?v=1791670158"},{"product_id":"svbony-sv136-3x-barlow-lens","title":"SVBONY SV136 1.25″ 3x Barlow Lens","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6371461546478121966262671.jpg?v=1791669869\" alt=\"SVBONY SV136 1.25 inch 3x 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 SV136 (item F9172C) is a 1.25″ 3x achromatic Barlow lens. It triples the effective focal length of your telescope, and with it the magnification of any 1.25″ eyepiece placed in it. The optics are three elements in two groups with multilayer broadband coatings, in a two-step anodized aluminium body with a matte finish. End caps and an eyepiece set screw are part of the design.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1_20250806112557_1125_20260820165253_8572.webp?v=1791670294\" alt=\"SVBONY SV136 1.25 inch 3x achromatic Barlow lens for planetary and lunar observing\" 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 with 1.25″ eyepieces and want planetary and lunar magnifications without buying very short focal-length eyepieces — especially on fast, short-focal-length telescopes, which SVBONY designed it for.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3x magnification:\u003c\/strong\u003e a 15 mm eyepiece behaves like a 5 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAchromatic 3-element \/ 2-group design:\u003c\/strong\u003e colour-corrected to keep chromatic aberration low.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated:\u003c\/strong\u003e multilayer HD broadband green coatings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-step anodized aluminium body:\u003c\/strong\u003e matte finish against reflections and glare.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd caps and set screw:\u003c\/strong\u003e dust protection and a secure eyepiece hold.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6371461548829188336109814.jpg?v=1791669869\" alt=\"SVBONY SV136 3x Barlow lens body and end caps\" 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 ahead of the focal plane that lengthens the effective focal length. The SV136 uses an achromatic three-element, two-group design to multiply focal length by three while keeping colour fringing in check, which matters most on fast telescopes where a simple Barlow would show more false colour.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6371461546479841036653991.jpg?v=1791669869\" alt=\"SVBONY SV136 3x Barlow lens optical design\" 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\u003ePlanetary observing:\u003c\/strong\u003e Jupiter, Saturn and Mars at high power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLunar detail\u003c\/strong\u003e along the terminator.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDouble stars.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepieces:\u003c\/strong\u003e SVBONY states it fits most 1.25″ eyepieces, including Celestron and Orion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocuser:\u003c\/strong\u003e inserts into a 1.25″ focuser or diagonal.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2_20250806112557_3239.jpg?v=1791670294\" alt=\"SVBONY SV136 1.25 inch 3x Barlow lens with end caps\" 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\u003eUseful magnification has a ceiling:\u003c\/strong\u003e aperture and seeing set it, so a 3x Barlow pairs best with medium and longer eyepieces.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1.25″ only.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e not published by SVBONY.\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 Barlow into your focuser or diagonal, place the eyepiece in it, tighten the set screw and refocus.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich eyepieces work best with it?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMedium to long focal lengths — roughly 12 mm to 25 mm — reach planetary magnifications with comfortable eye relief.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy 3x rather than 2x?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOn fast, short-focal-length telescopes, 3x reaches high planetary powers that a 2x Barlow would need very short eyepieces to match.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 1.25″ achromatic 3x Barlow with fully multi-coated 3-element optics, made to give fast telescopes planetary magnifications with the eyepieces you already have.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"Default Title","offer_id":67722265722991,"sku":"F9172C","price":30.77,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1_20250806112557_1125_20260820165253_8572.webp?v=1791670294"}],"url":"https:\/\/ontariotelescope.com\/collections\/eyepiece-barlows-svbony.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}