{"product_id":"svbony-sv137-2x-fmc-barlow-lens-with-m42-threads-125in","title":"SVBONY SV137 2X FMC Barlow Lens with M42 Threads - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eInstantly doubles the magnification of any 1.25\" eyepiece\u003c\/li\u003e\n\u003cli\u003eFully multi-coated (FMC) optics for bright, high-contrast views\u003c\/li\u003e\n\u003cli\u003eFeatures M42 x 0.75 T-threads for direct camera attachment\u003c\/li\u003e\n\u003cli\u003eBrass compression ring secures eyepieces without scratching barrels\u003c\/li\u003e\n\u003cli\u003eDurable, CNC-machined aluminum body\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV137 1.25\" 2X FMC Barlow Lens\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV137 2X Barlow Lens instantly doubles the power of any 1.25\" eyepiece, effectively expanding your magnification options without needing a separate set of high-power eyepieces. With integrated M42 x 0.75 T-threads, it also serves as a 2x amplifier for astrophotography, allowing direct connection to a DSLR T-ring for planetary and lunar imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2x Magnification Boost with Fully Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eThis Barlow lens doubles the magnification of your eyepiece, bringing out finer details on the Moon's surface, resolving the cloud bands of Jupiter, or splitting tight double stars. The fully multi-coated (FMC) lenses ensure that as magnification increases, light transmission remains high and contrast is preserved, preventing the washed-out images common with lesser Barlows. While any 2x Barlow narrows the field of view, the SV137's optical design maintains image sharpness and clarity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSecure Fit: 1.25\" Barrel with Brass Ring and M42 Threads\u003c\/h3\u003e\n\u003cp\u003eBuilt from CNC-machined aluminum, the SV137 is designed for durability in the field. Its 1.25\" barrel features a non-marring brass compression ring that provides a secure, concentric grip on your eyepiece without scratching the barrel, unlike simple thumbscrew designs. For imagers, the top of the Barlow unscrews to reveal standard M42 T-threads, creating a solid, threaded connection to your camera for stable, focused shots.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SVBONY SV137 2X Barlow affect the view of Jupiter in my 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a typical 8\" f\/10 SCT (around 2000mm focal length), a 10mm eyepiece yields 200x magnification. Adding the SVBONY SV137 Barlow will double this to 400x, which is near the practical limit for that aperture. This increased power will make Jupiter's Great Red Spot and individual cloud bands much larger and more distinct, assuming atmospheric seeing conditions are stable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV137 Barlow Lens for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The SV137 is ideal for planetary, lunar, and solar (with a proper telescope filter) imaging. The top section unscrews to reveal \u003cstrong\u003eM42 x 0.75 T-threads\u003c\/strong\u003e. This allows you to connect a DSLR or dedicated astronomy camera directly using a T-ring, effectively doubling your telescope's focal length and image scale to capture more detail on small targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the brass compression ring on the SV137 Barlow?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe brass compression ring provides a superior way to secure your 1.25\" eyepieces. When you tighten the thumbscrew, it presses the soft brass ring gently and uniformly against the eyepiece barrel. This prevents the set screw from directly digging into and scratching the barrel, preserving the condition of your eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the SVBONY SV137 work with a small 70mm refractor for viewing the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. A 70mm refractor is an excellent instrument for lunar observing. Using the SV137 Barlow will double the magnification of your existing eyepieces, allowing you to zoom in on specific craters, rilles, and mountain ranges on the Moon's surface for a more detailed and immersive view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the optics in the SV137 Barlow fully multi-coated?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SVBONY SV137 features \u003cstrong\u003efully multi-coated (FMC)\u003c\/strong\u003e lenses. This means all air-to-glass surfaces have multiple layers of anti-reflection coatings applied, which maximizes light transmission and enhances image contrast and brightness compared to optics that are only single-coated or partially coated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV137 compatible with all 1.25\" eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SV137 is designed to work with any standard 1.25\" telescope eyepiece. Its brass compression ring ensures a secure fit for eyepieces of varying weights and designs without causing damage to their barrels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification Factor\u003c\/td\u003e\n\u003ctd\u003e2x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Threads\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (T-thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocking Mechanism\u003c\/td\u003e\n\u003ctd\u003eBrass Compression Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eCNC-Machined Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSV137 1.25\" 2X Barlow Lens\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861235888413,"sku":"SV-W9106B","price":25.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV137-1-25-2X-FMC-Barlow-Lens-with-Brass-Ring-for-Telescope-1_759b1f1e-4174-455b-b203-80b0140b53d7.jpg?v=1788660156","url":"https:\/\/davidastro.com\/fr\/products\/svbony-sv137-2x-fmc-barlow-lens-with-m42-threads-125in","provider":"David Astro","version":"1.0","type":"link"}