{"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\/products\/svbony-sv136-3x-barlow-lens","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}