{"product_id":"svbony-sv136-3x-barlow-lens-125in","title":"SVBONY SV136 3X Barlow Lens - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTriples eyepiece magnification by a factor of 3x\u003c\/li\u003e\n\u003cli\u003eFits standard 1.25 inch focusers and accessories\u003c\/li\u003e\n\u003cli\u003eAchromatic 3-element, 2-group lens design minimizes color fringing\u003c\/li\u003e\n\u003cli\u003eFeatures multilayer HD broadband green film coatings for high contrast\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\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 SV136 Barlow 3x 1.25 inch\u003c\/h2\u003e\n      \u003cp\u003eThe Svbony SV136 Barlow delivers a full 3x magnification increase to any 1.25 inch eyepiece, achieved through an advanced 3-element, 2-group achromatic lens structure. This design, combined with multilayer HD broadband green film coatings, ensures that the tripled power does not come at the cost of sharpness or color fidelity, providing high-contrast views of planetary surfaces and tight double stars.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e3-Element Achromatic Design: 3x Magnification with High Correction\u003c\/h3\u003e\n      \u003cp\u003eUnlike basic 2-element Barlows, the Svbony SV136 uses a more complex 3-element in 2-groups optical layout. This achromatic design actively corrects for chromatic aberration, preventing the distracting blue or yellow halos that can appear around bright objects like Jupiter or the lunar limb at high power. The result is a sharper, more color-pure image, allowing you to push magnification on nights of good seeing.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eAchromatic Correction:\u003c\/strong\u003e The 3-element lens system significantly reduces false color for true-to-life views of planetary cloud bands and stellar colors.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMultilayer HD Coatings:\u003c\/strong\u003e Fully multi-coated optics maximize light transmission and suppress internal reflections, enhancing image brightness and contrast.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eMaximizing Detail in 1.25\" Fast Telescopes\u003c\/h3\u003e\n      \u003cp\u003eThis 3x Barlow is particularly effective in telescopes with short focal lengths, such as fast Newtonians or short-tube refractors. It allows you to reach the high magnifications needed for detailed planetary observation using longer eye-relief 1.25 inch eyepieces, which are far more comfortable to look through than very short focal length Plössls or orthoscopics.\u003c\/p\u003e\n      \u003cul\u003e\n          \u003cli\u003e\n\u003cstrong\u003eUniversal 1.25\" Barrel:\u003c\/strong\u003e Slides into any standard 1.25\" focuser or diagonal, making it compatible with a vast range of telescopes and eyepieces.\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eSecure Eyepiece Lock:\u003c\/strong\u003e A built-in set screw holds your eyepiece firmly in place, preventing any wobble or accidental slips during observation.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eSvbony SV136 3x vs. Standard 2x Barlows: When to Use More Power\u003c\/h3\u003e\n      \u003cp\u003eA 2x Barlow is a versatile workhorse, but a 3x Barlow like the SV136 is a specialist tool for when atmospheric conditions permit maximum magnification. On nights of steady seeing, the 3x factor can reveal finer details, such as the Cassini Division in Saturn's rings or subtle festoons in Jupiter's belts, that might be missed at 2x.\u003c\/p\u003e\n      \u003cp\u003eThe primary trade-off is sensitivity to atmospheric turbulence; a 3x Barlow will amplify poor seeing more than a 2x. However, for a dedicated planetary observer with a well-collimated telescope, the SV136 offers a critical step up in power for those fleeting moments of perfect atmospheric stability.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the Svbony SV136's 3-element lens design?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003e3-element, 2-group achromatic design\u003c\/strong\u003e provides superior color correction compared to simpler 2-element Barlows. This minimizes chromatic aberration (color fringing) on high-contrast targets like the Moon and bright planets, resulting in a sharper and more natural-looking image at high magnification.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Svbony SV136 3x Barlow a good choice for my 8-inch f\/5 Dobsonian?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, it's an excellent match. An 8-inch f\/5 Dobsonian has a focal length of about 1000mm. With a 25mm eyepiece, you get 40x magnification. Using the Svbony SV136 3x Barlow with that same eyepiece boosts the power to 120x, a great starting point for planetary detail, without requiring an uncomfortable short-focal-length eyepiece.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I use the Svbony SV136 3x Barlow instead of a 2x for viewing Saturn?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eUse the \u003cstrong\u003eSvbony SV136 3x Barlow\u003c\/strong\u003e on nights of very steady atmospheric seeing. While a 2x Barlow provides a reliable power boost, the 3x is for pushing your telescope to its limit. If the air is stable, the 3x magnification can make the Cassini Division in Saturn's rings appear as a sharp, black gap, a detail that might be less distinct at 2x.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Svbony SV136 3x Barlow work with my existing 1.25\" eyepieces?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. The Svbony SV136 features a standard \u003cstrong\u003e1.25 inch barrel\u003c\/strong\u003e that is compatible with virtually all 1.25\" telescope eyepieces, diagonals, and focusers from any brand. It includes a set screw to securely hold your eyepiece in place.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the coatings on the Svbony SV136 Barlow improve the view?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe lenses feature a \u003cstrong\u003emultilayer HD broadband green film\u003c\/strong\u003e. These advanced coatings increase light transmission and drastically reduce internal reflections and glare. This leads to a brighter, higher-contrast image, which is crucial for seeing faint details on planetary surfaces.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Svbony SV136 3x Barlow for planetary imaging?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, it is very useful for planetary imaging. A 3x Barlow increases the effective focal length of your telescope, which enlarges the image of a planet on your camera's sensor. This allows you to capture more detail on small targets like Mars, Jupiter, and Saturn with a dedicated planetary camera.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMagnification Factor\u003c\/td\u003e\n\u003ctd\u003e3x\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLens Structure\u003c\/td\u003e\n\u003ctd\u003e3-Elements \/ 2-Groups, Achromatic\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eMultilayer HD broadband green film\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\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":52861235495197,"sku":"SV-F9172C","price":21.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV136-Barlow-3x-1-25-inch-1_1248c580-3446-473c-904a-742a7daaaaf2.jpg?v=1788660096","url":"https:\/\/davidastro.com\/fr-us\/products\/svbony-sv136-3x-barlow-lens-125in","provider":"David Astro","version":"1.0","type":"link"}