{"title":"SVBONY Eyepieces","description":"\u003cp\u003eSVBONY eyepieces cover most visual needs in 1.25\" barrels. The SV131 48° Plössls run from 17mm to 40mm in this collection, the 68° series in 6mm, 15mm and 20mm widens the view, and 62° aspherics in 4mm and 10mm reach high power on the Moon and planets. The SV230 8-20mm and SV245 zooms replace several eyepieces in one, and the SV190 UF gives a flat field.\u003c\/p\u003e\u003cp\u003eThe SV152 illuminated crosshair helps with alignment and manual guiding.\u003c\/p\u003e","products":[{"product_id":"svbony-40mm-plossl-eyepiece-with-filter-threads-125in","title":"SVBONY 40mm Plössl Eyepiece with Filter Threads - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e40mm Focal Length\u003c\/li\u003e\n\u003cli\u003e40° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eStandard M28.5*0.6 Filter Threads\u003c\/li\u003e\n\u003cli\u003eLightweight 82g Metal Construction\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 1.25inch Plossl Eyepiece 40mm with Filter Threads\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY 1.25inch Plossl Eyepiece delivers the lowest practical magnification in the 1.25-inch format with its 40mm focal length. Its classic 4-element, 2-group Plössl design provides a 40-degree apparent field of view, ideal for maximizing image brightness in a lightweight 82g metal body.\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\u003eThe 40mm Plössl Advantage: Maximizing Brightness in a 1.25\" Barrel\u003c\/h3\u003e\n\u003cp\u003eWith a 40mm focal length, this eyepiece is engineered to produce the largest possible exit pupil in a 1.25\" barrel, making it an essential tool for \"finder\" applications in long focal-ratio telescopes like SCTs and Maksutovs. The resulting bright image is particularly beneficial when using narrow-band nebula filters, as it helps offset the dimming effect of the filter, making faint structures like the Veil Nebula (NGC 6960) easier to detect.\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\u003e4-Element Design with Fully Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece uses a classic 4-element, 2-group Plössl optical design known for sharp, high-contrast views. All air-to-glass surfaces are fully multi-coated (FMC) to maximize light transmission and reduce reflections. Combined with blackened lens edges, this design suppresses internal stray light, delivering a clean, dark background sky that makes stars and faint deep-sky objects stand out.\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\u003eSVBONY 40mm vs. a 32mm Plössl: A 40° Field Trade-Off\u003c\/h3\u003e\n\u003cp\u003eWhile a standard 32mm Plössl offers a wider apparent field of view (typically around 52°), the SVBONY 40mm Plössl's key advantage is its lower magnification and brighter image. The trade-off is its narrower 40° apparent field. For observers with f\/10 or slower telescopes, the 40mm is often the better choice for locating objects and observing large, faint nebulae, while the 32mm provides a more immersive, wide-window feeling on brighter targets.\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\"\u003eWhy choose the SVBONY 40mm Plössl instead of a 32mm Plössl?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY 40mm Plössl provides lower magnification and a larger exit pupil than a 32mm Plössl. This results in a brighter image, which is highly advantageous for locating faint objects, observing with nebula filters, and using long focal-ratio telescopes like Schmidt-Cassegrains. The primary trade-off is a narrower \u003cstrong\u003e40° apparent field of view\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SVBONY 40mm Plössl perform on the Orion Nebula (M42) in an 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn an 8\" f\/10 SCT (2032mm focal length), the SVBONY 40mm Plössl will provide 51x magnification and a large 4mm exit pupil. This is an excellent combination for viewing the Orion Nebula (M42), revealing its full extent from the bright Trapezium core out to the fainter outer loops of nebulosity, all within a single bright field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 40mm eyepiece work with my 1.25\" nebula filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The SVBONY 40mm Plössl features standard \u003cstrong\u003eM28.5*0.6 filter threads\u003c\/strong\u003e on its 1.25\" barrel, making it compatible with all standard 1.25\" astronomy filters, including UHC, O-III, and H-beta filters for enhanced views of nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY 40mm Plössl good for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this eyepiece is not designed for planetary viewing. Its \u003cstrong\u003e40mm focal length\u003c\/strong\u003e provides very low magnification, which is ideal for finding objects and viewing large deep-sky targets. For observing planets like Jupiter or Saturn, you would need a short focal length eyepiece (e.g., 6mm to 10mm) to achieve the high magnification required to see surface details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the SVBONY 40mm Plössl's 40° apparent field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 40° apparent field is a direct result of maximizing the focal length within the constraints of a 1.25\" barrel. While narrower than other designs, it allows the eyepiece to deliver the lowest possible magnification and brightest image for this format, which is its primary purpose. It serves as an excellent \"finder\" eyepiece for scanning large areas of the sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"blackened lens edges\" on the SVBONY 40mm Plössl do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eBlackened lens edges\u003c\/strong\u003e absorb stray light that might otherwise reflect off the side of the lenses and enter the light path. This simple but effective feature improves image contrast by reducing internal glare, resulting in a darker background sky and making faint objects easier to see.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e40mm\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\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e40 Degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003ePlössl, 2 groups \/ 4 elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlackened Lens Edges\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecup Type\u003c\/td\u003e\n\u003ctd\u003eRubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eMetal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e79mm \/ 3.11in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e82 g \/ 2.9oz\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\"\u003e1.25inch Plossl Eyepiece 40mm\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\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":52861228777757,"sku":"SV-F9122A","price":24.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-1-25inch-Plossl-Eyepiece-40mm-with-Filter-Threads-1_794671a4-0f60-4fb7-ac78-9e331fd48d25.jpg?v=1788659618"},{"product_id":"svbony-12-5mm-illuminated-reticle-plossl-crosshair-eyepiece-125in","title":"SVBONY 12.5mm Illuminated Reticle Plössl Crosshair Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e12.5mm Focal Length\u003c\/li\u003e\n\u003cli\u003e40° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eIlluminated Double Crosshair Reticle\u003c\/li\u003e\n\u003cli\u003e4-Element Plossl Optical Design\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\u003eDownloads\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 1.25\" 12.5mm Illuminated Reticle Eyepiece Plossl Crosshair Kit\u003c\/h2\u003e\n\u003cp\u003eThe Svbony 1.25\" 12.5mm Illuminated Reticle Eyepiece combines a classic 4-element Plossl optical design with a red-illuminated double crosshair to deliver tack-sharp alignment. With a 40° apparent field of view, this eyepiece is a dedicated tool for accurately centering guide stars, performing precise polar alignment, and calibrating the pointing accuracy of your Go-To mount.\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\u003ePrecision Alignment: The 12.5mm Red-Illuminated Double Crosshair\u003c\/h3\u003e\n\u003cp\u003eThe core of this eyepiece is its illuminated double crosshair reticle. Unlike a single-line reticle, the double crosshair allows you to perfectly frame a star within the central box, eliminating any guesswork when centering an object. The adjustable red LED illumination ensures the reticle is clearly visible against a dark sky without compromising your night vision.\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\u003eA 4-Element Plossl with a 40° Field\u003c\/h3\u003e\n\u003cp\u003eBased on a 4-element Plossl design, the eyepiece provides sharp, high-contrast views suitable for its alignment task. The 40° apparent field of view is intentionally constrained to give you a clear, focused area for centering stars. Fully multi-coated (FMC) lenses and blackened internal surfaces maximize light transmission and suppress internal reflections, ensuring your target star appears as a bright, distinct point against a dark background.\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\u003eGo-To Centering and Guiding in any 1.25\" Focuser\u003c\/h3\u003e\n\u003cp\u003eWeighing only 170g and fitting any standard 1.25\" focuser, this eyepiece is a universal tool for any telescope setup. It is essential for the final, high-magnification centering step in a multi-star Go-To alignment, dramatically improving pointing accuracy across the sky. For imagers, it serves as an excellent manual guiding eyepiece in an off-axis guider or a separate guidescope, allowing for precise corrections to keep your target locked for long exposures.\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\"\u003eWhat is the Svbony 12.5mm Illuminated Eyepiece primarily used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis Svbony eyepiece is a specialized tool designed for high-precision centering tasks. Its primary uses are for \u003cstrong\u003epolar alignment\u003c\/strong\u003e, \u003cstrong\u003eGo-To mount alignment\u003c\/strong\u003e, and \u003cstrong\u003emanual guiding\u003c\/strong\u003e for astrophotography. It can also be used for measuring position angles of double stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the illuminator on the Svbony 12.5mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe illuminator is powered by \u003cstrong\u003ethree 1.5V alkaline batteries\u003c\/strong\u003e, which are housed within the illuminator module itself. The brightness of the red LED crosshairs can be adjusted by rotating the dial on the illuminator.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 40° field of view on the Svbony eyepiece wide enough for finding objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the 40° field of view is relatively narrow and not intended for searching for or \"finding\" objects. This is a purposeful design choice. The eyepiece is meant to be used \u003cstrong\u003eafter\u003c\/strong\u003e an object is already in the field of a wider eyepiece, providing the higher magnification needed to precisely center it on the crosshairs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this Svbony 12.5mm eyepiece help with polar aligning my mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor mounts without a dedicated polar scope, you can use this eyepiece in your main telescope to perform a drift alignment. By monitoring a star's drift relative to the fixed crosshairs, you can make precise adjustments to your mount's altitude and azimuth to achieve a highly accurate polar alignment, which is critical for long-exposure imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Svbony 12.5mm Illuminated Eyepiece for manually guiding on a star like Vega (Alpha Lyrae) with my 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. An 8\" f\/10 SCT has a focal length around 2000mm, where the 12.5mm eyepiece provides 160x magnification. This is an excellent magnification for manual guiding. You would place a bright star like Vega in the double crosshairs and make small corrections with your mount's hand controller to keep it perfectly centered for the duration of your main camera's exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of a \"double crosshair\" reticle on this Svbony eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA double crosshair reticle consists of two closely spaced parallel lines for both the horizontal and vertical axes. This creates a small, empty box in the center. The goal is to place your target star neatly inside this box rather than trying to hide it behind a single, solid line. This makes it much easier to judge when the star is perfectly centered.\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\u003eEyepiece Type\u003c\/td\u003e\n\u003ctd\u003eIlluminated Reticle Eyepiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003ePlossl (4 elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e12.5mm\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\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e40°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReticle\u003c\/td\u003e\n\u003ctd\u003eDouble Crosshair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eThree 1.5V alkaline batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e70 x 60 x 60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e170g\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\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 Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861228876061,"sku":"SV-F9132A","price":41.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-1-25-12-5mm-Illuminated-Reticle-Eyepiece-Plossl-Crosshair-Kit-1_5e179808-f0a7-4c2c-ae5e-401d436df40d.jpg?v=1788659627"},{"product_id":"svbony-25mm-plossl-metal-fmc-eyepiece-125in","title":"SVBONY 25mm Plössl Metal FMC Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e25mm Focal Length\u003c\/li\u003e\n\u003cli\u003e40° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Diameter Barrel\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated (FMC) Optics\u003c\/li\u003e\n\u003cli\u003e4-Element Plossl Design\u003c\/li\u003e\n\u003cli\u003eStandard M28.5*0.6 Filter Threads\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 Plossl Metal FMC Eyepiece 25mm 1.25inch\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY Plossl Metal FMC Eyepiece delivers a classic moderate-power view with its 25mm focal length and 4-element optical design. Its 40-degree apparent field of view fits comfortably in any standard 1.25\" focuser, providing sharp, high-contrast images of the moon, planets, and brighter deep-sky objects.\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\u003eA Classic General-Purpose Optic: The 25mm, 40° View\u003c\/h3\u003e\n\u003cp\u003eWith a 25mm focal length, this eyepiece provides low-to-moderate magnification that is ideal for locating objects and observing larger star clusters and nebulae. The 40-degree apparent field of view is a hallmark of the Plossl design, offering a sharp, well-corrected image across the entire field, a noticeable improvement over simpler 2- or 3-element eyepieces.\u003c\/p\u003e\n\u003cp\u003eThis combination makes the 25mm Plossl a workhorse for any telescope. It's an excellent choice for viewing the entire lunar disc, tracking Jupiter and its moons, or framing open clusters like the Pleiades (M45) within a rich, dark background.\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\u003eMaximizing Contrast: 4 Elements with FMC Coatings\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece's optical system consists of a 4-element design arranged in 2 groups, a configuration known for producing high-contrast views with minimal internal reflections. To further enhance this, all air-to-glass surfaces are fully multi-coated (FMC), increasing light transmission for brighter images. The lens edges are also blackened to absorb stray light that can reduce contrast and wash out faint details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-Coated Lenses:\u003c\/strong\u003e Reduces light loss, resulting in brighter views of faint objects like the Orion Nebula (M42) compared to single-coated or uncoated optics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlackened Lens Edges:\u003c\/strong\u003e Improves contrast by preventing off-axis light from scattering within the eyepiece, making it easier to see fine details on planetary surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRubber Eye Guard:\u003c\/strong\u003e Blocks ambient light and allows you to comfortably position your eye for a stable view. The 79g weight ensures it won't create balance issues on smaller telescopes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSVBONY 25mm Plossl vs. Standard Kit Eyepieces\u003c\/h3\u003e\n\u003cp\u003eMany beginner telescopes are supplied with basic Kellner or Huygens eyepieces. The SVBONY 25mm Plossl represents a significant and affordable upgrade over these stock accessories. The primary differences lie in the optical design and coatings.\u003c\/p\u003e\n\u003cp\u003eThe Plossl's 4-element design provides superior correction for optical aberrations compared to 3-element Kellners, resulting in sharper stars at the edge of the field. Furthermore, the Fully Multi-Coated optics transmit significantly more light, making every object appear brighter and more detailed. For a small investment, this eyepiece can dramatically improve the views from your existing telescope.\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\"\u003eWhat views can I expect with the SVBONY 25mm Plossl in an 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 Schmidt-Cassegrain Telescope (SCT) with a 2032mm focal length, the SVBONY 25mm Plossl will provide 81x magnification. This is an excellent magnification for viewing globular clusters like the Hercules Cluster (M13), resolving planetary details on Jupiter and Saturn, and observing medium-sized galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SVBONY 25mm Plossl perform on the Andromeda Galaxy (M31) in a small refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a short focal length refractor, like a 72mm f\/6, this eyepiece will yield low power (around 17x). This provides a wide true field of view, perfect for framing large objects. You'll be able to see the bright core of the Andromeda Galaxy (M31) and its satellite galaxies M32 and M110 all in the same field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 40-degree field of view of the SVBONY 25mm Plossl a limitation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the 40-degree apparent field is narrower than more expensive wide-field eyepieces, it is a deliberate trade-off of the Plossl design. This focus allows for excellent sharpness, high contrast, and good control of optical aberrations with only 4 lens elements. It provides a clean, classic \"porthole\" view into space that many observers appreciate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose a prime eyepiece like the SVBONY 25mm Plossl over a zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA prime (fixed focal length) eyepiece like this 25mm Plossl generally offers better optical quality for the price than a zoom eyepiece. With fewer moving parts and a simpler optical path, it typically delivers sharper, higher-contrast images. While a zoom offers convenience, a good quality Plossl often provides a superior viewing experience at its specific magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the threads on the SVBONY 25mm Plossl compatible with standard filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The eyepiece features standard \u003cstrong\u003eM28.5*0.6 threads\u003c\/strong\u003e on the inside of the 1.25\" barrel. This allows you to attach any standard 1.25\" astronomical filter, such as a Moon filter for lunar observing or a light pollution filter for enhancing deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the SVBONY 25mm Plossl a good \"first upgrade\" eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt's an ideal first upgrade because it offers a noticeable improvement in brightness, contrast, and sharpness over the basic eyepieces included with most beginner telescopes, without a high cost. Its 25mm focal length is extremely versatile, making it useful for nearly any type of celestial object.\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\u003eEyepiece Type\u003c\/td\u003e\n\u003ctd\u003ePlossl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003e4 Elements in 2 Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e25mm\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\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e40°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6 (Standard 1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlackened Lens Edges\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRubber Eye Guard\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e72mm \/ 2.82in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e79g \/ 2.8oz\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\"\u003eSVBONY Plossl 25mm Eyepiece\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\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":52861229039901,"sku":"SV-F9149A","price":22.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Plossl-Metal-FMC-Eyepieces-25mm-1-25inch-1_dd4d7fca-12b1-40be-ae0f-5bb97ddca409.jpg?v=1788659635"},{"product_id":"svbony-6mm-68-telescope-eyepiece-125in","title":"SVBONY 6mm 68° Telescope Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861229138205,"sku":"SV-F9152A","price":42.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-9mm-68-telescope-eyepiece-125in","title":"SVBONY 9mm 68° Telescope Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861229203741,"sku":"SV-F9152B","price":39.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-15mm-68-telescope-eyepiece-125in","title":"SVBONY 15mm 68° Telescope Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861229269277,"sku":"SV-F9152C","price":34.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-20mm-68-telescope-eyepiece-125in","title":"SVBONY 20mm 68° Telescope Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861229367581,"sku":"SV-F9152D","price":39.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-6mm-66-ultra-wide-angle-eyepiece-125in","title":"SVBONY 6mm 66° Ultra Wide Angle Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e66° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003eAvailable in 6mm, 9mm, 15mm, and 20mm Focal Lengths\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated Optics\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" Barrel\u003c\/li\u003e\n\u003cli\u003eThreaded for 1.25\" Filters\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 1.25\" 66° Ultra Wide Eyepiece\u003c\/h2\u003e\n      \u003cp\u003eThe SVBONY 1.25\" 66° Ultra Wide Eyepiece series, available in 6mm, 9mm, 15mm, and 20mm focal lengths, delivers a dramatically larger viewing area than conventional eyepiece designs. This expanded 66° apparent field creates an immersive, wide-window effect on the sky, allowing you to frame large star clusters and nebulae completely within the standard 1.25\" format.\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\u003eA 66° Window on the Sky\u003c\/h3\u003e\n      \u003cp\u003eThe key feature of this eyepiece line is the 66° apparent field of view. This represents a significant increase in observable sky compared to the 50-52° field of a typical Plössl eyepiece, without requiring a move to a 2\" focuser. This wider perspective makes it easier to locate objects and appreciate the context of targets like the Andromeda Galaxy (M31) or the Pleiades (M45) against the background starfield.\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\u003e1.25” Body with High-Contrast Internals\u003c\/h3\u003e\n      \u003cp\u003eEach eyepiece is built into a durable aluminum 1.25\" barrel that is compatible with virtually any telescope focuser. The interior of the housing is blackened to absorb stray light, preventing internal reflections from reducing image contrast. This ensures a dark background, making faint details on planets or in nebulosity more apparent. The barrel is also threaded to accept standard 1.25\" astronomy filters, allowing you to easily add a moon filter or nebula filter to your setup.\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\u003eSVBONY 66° UWA vs. a 52° Plössl Eyepiece\u003c\/h3\u003e\n      \u003cp\u003eCompared to a standard 52° Plössl of the same focal length, the SVBONY 66° eyepiece offers a noticeably more expansive view. While a Plössl is a sharp, high-contrast workhorse, its narrower field can feel restrictive on large deep-sky objects.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eField of View:\u003c\/strong\u003e The SVBONY's 66° field feels more like looking through a porthole than a narrow tube, making observations more engaging.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eObject Framing:\u003c\/strong\u003e The wider field allows you to fit entire open clusters like the Beehive Cluster (M44) into a single view at higher power, something a 52° Plössl might struggle with.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTrade-Offs:\u003c\/strong\u003e While offering a wider view, budget-friendly ultra-wide eyepieces may exhibit some softness at the very edge of the field in fast (f\/5 or lower) telescopes. This is a common trade-off for achieving the wide-field experience at an accessible price point.\u003c\/li\u003e\n      \u003c\/ul\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\"\u003eWhich SVBONY 66° eyepiece is best for planetary viewing on an 8\" f\/10 SCT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFor an 8\" f\/10 SCT with a 2000mm focal length, the \u003cstrong\u003e9mm SVBONY 66° eyepiece\u003c\/strong\u003e would provide 222x magnification, which is an excellent power for viewing details on Jupiter and Saturn. The 6mm eyepiece would yield 333x, which may be too high for average seeing conditions.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 66° field of the SVBONY eyepiece help when observing the Orion Nebula (M42)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe 66° field of view allows you to see more of the surrounding nebulosity and the \"wings\" of the Orion Nebula (M42) at the same time you are observing the central Trapezium star cluster. A narrower eyepiece would require you to pan around to see the full extent of the object.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the SVBONY 66° eyepiece over a standard Plössl?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe main advantage is the significantly wider \u003cstrong\u003e66° apparent field of view\u003c\/strong\u003e compared to the ~52° field of a Plössl. This provides a more immersive, \"spacewalk\" feeling and makes it easier to frame large celestial objects without having to move the telescope as often.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 1.25\" filters with the SVBONY 66° eyepieces?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The 1.25\" barrel of each SVBONY 66° eyepiece is threaded to accept all standard 1.25\" astronomy filters, such as moon filters, planetary color filters, or light pollution filters.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of optical coatings do the SVBONY 66° eyepieces have?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThese eyepieces feature \u003cstrong\u003efully multi-coated optics\u003c\/strong\u003e. This means that all air-to-glass surfaces have multiple layers of anti-reflection coatings to maximize light transmission and image contrast.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eAre the SVBONY 66° Ultra Wide eyepieces parfocal?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe eyepieces in this series are not guaranteed to be parfocal, meaning you will likely need to make a small focus adjustment when switching between different focal lengths (e.g., from the 20mm to the 9mm).\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\u003eFocal Lengths\u003c\/td\u003e\n\u003ctd\u003e6mm, 9mm, 15mm, 20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e66°\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\" (31.7mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLens Structure\u003c\/td\u003e\n\u003ctd\u003eMulti-element\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eStandard 1.25\" Filter Thread (M28.5 x 0.6)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum\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    \u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eSVBONY 1.25\" 66° Ultra Wide Eyepiece\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\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":52861229564189,"sku":"SV-F9157A","price":45.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-1-25-66-Ultra-Wide-Eyepiece-6-9-15-20mm-Fully-Multi-Coated-1_58cc5998-d724-49e2-b9a3-108f59a54bce.jpg?v=1788659667"},{"product_id":"svbony-9mm-66-ultra-wide-angle-eyepiece-125in","title":"SVBONY 9mm 66° Ultra Wide Angle Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861229695261,"sku":"SV-F9157B","price":38.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-15mm-66-ultra-wide-angle-eyepiece-125in","title":"SVBONY 15mm 66° Ultra Wide Angle Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861229793565,"sku":"SV-F9157C","price":37.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-20mm-66-ultra-wide-angle-eyepiece-125in","title":"SVBONY 20mm 66° Ultra Wide Angle Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861229859101,"sku":"SV-F9157D","price":37.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-sv136-34mm-72-telescope-eyepiece-2in","title":"SVBONY SV136 34mm 72° Telescope Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e34mm Focal Length\u003c\/li\u003e\n\u003cli\u003e72° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e2-inch Barrel Diameter\u003c\/li\u003e\n\u003cli\u003e24mm Eye Relief\u003c\/li\u003e\n\u003cli\u003e40mm Field Stop Diameter\u003c\/li\u003e\n\u003cli\u003eAccepts Standard 2\" (M48x0.75) Filters\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 SV136 34mm 72° Eyepiece - 2\"\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV136 delivers an expansive deep-sky experience, combining a low-power 34mm focal length with an immersive 72° apparent field of view in a 2-inch barrel. Inside, a 5-element, 4-group optical system and a wide 40mm field stop maximize the true field of view, while the generous 24mm of eye relief ensures comfortable viewing for all observers.\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\u003eA 72° Window on the Deep Sky\u003c\/h3\u003e\n\u003cp\u003eDesigned for wide, contextual views, the SV136's 72° apparent field feels less like looking through an eyepiece and more like a porthole into space. The combination of the 34mm focal length and a 40mm field stop produces a massive true field of view, allowing you to frame large deep-sky objects like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000) in their entirety.\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\u003e5-Element Design for Sharp, Wide Views\u003c\/h3\u003e\n\u003cp\u003eTo control optical aberrations across its wide field, the SV136 uses a 5-element, 4-group lens structure. This advanced design corrects for issues like field curvature and astigmatism that can soften stars at the edge of the view in simpler eyepieces. Fully multi-coated optics ensure high light transmission and contrast, critical for resolving faint details in distant galaxies and nebulae.\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\u003eComfortable Viewing with 24mm of Eye Relief\u003c\/h3\u003e\n\u003cp\u003eWith a generous 24mm of eye relief, the SV136 is exceptionally comfortable for long observing sessions. This long eye relief allows eyeglass wearers to see the entire 72° field of view without having to remove their glasses. For observers without glasses, it provides a relaxed, non-critical eye placement, reducing fatigue as you scan the Milky Way.\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\u003eSV136 34mm vs. a Standard Plössl: Why 72° Matters\u003c\/h3\u003e\n\u003cp\u003eWhile a standard 2-inch Plössl eyepiece offers excellent on-axis sharpness, its apparent field is typically limited to around 50°. The SV136's 72° field of view provides a significantly more immersive and engaging experience. This wider perspective not only makes large objects easier to frame but also enhances the feeling of being surrounded by the starfield, transforming your telescope into a true wide-field instrument.\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\"\u003eWhat is the SVBONY SV136 34mm eyepiece best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV136 34mm is designed for low-power, wide-field observation of deep-sky objects (DSOs). Its 72° apparent field of view is ideal for framing large targets such as open star clusters, large nebulae like the Orion Nebula (M42), and galaxies like Andromeda (M31).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SV136 34mm perform on the Andromeda Galaxy (M31) in an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a typical 8\" f\/10 Schmidt-Cassegrain Telescope, this eyepiece will provide low magnification (around 60x) and a very wide true field of view. This allows you to see the bright core of the Andromeda Galaxy (M31) along with its faint, extended spiral arms and its companion galaxies (M32 and M110) all in a single, immersive view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the 24mm eye relief on the SV136 34mm work well with eyeglasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003e24mm eye relief\u003c\/strong\u003e is considered very generous and is ideal for observers who wear glasses. It allows you to position your eye at a comfortable distance from the lens and still see the entire 72° apparent field of view without vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the SVBONY SV136 34mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The eyepiece is equipped with standard \u003cstrong\u003e2\" filter threads (M48 x 0.75)\u003c\/strong\u003e on the barrel. This allows you to easily attach nebula filters, light pollution filters, or other 2-inch astronomical filters to enhance your views.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SV136 34mm a good choice for viewing the Orion Nebula (M42) with a 10\" f\/5 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. On a 10\" f\/5 Dobsonian, the SV136 34mm eyepiece will provide about 37x magnification and a very wide field. This is perfect for framing the entire Orion Nebula complex, including the Trapezium, the main nebulosity (M42), De Mairan's Nebula (M43), and the nearby Running Man Nebula (NGC 1977) all within the same 72-degree field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV136 34mm eyepiece good for high-magnification planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this eyepiece is not designed for high-magnification viewing. Its long \u003cstrong\u003e34mm focal length\u003c\/strong\u003e produces very low power, which is ideal for large, faint objects. For detailed views of planets like Jupiter and Saturn, you would need an eyepiece with a much shorter focal length (e.g., 5mm to 10mm).\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e34mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e72°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e24mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Structure\u003c\/td\u003e\n\u003ctd\u003e5-Elements in 4-Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eStandard 2\" (M48 x 0.75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\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\"\u003eSV136 34mm Eyepiece\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\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":52861229957405,"sku":"SV-F9172D","price":98.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV136-Telescope-Eyepieces-2-inch-34mm-72-Degree-for-DSO-Observation-1_ac1a80bd-b209-4590-853b-69e50c36ea31.jpg?v=1788883323"},{"product_id":"svbony-4mm-62-aspheric-eyepiece-125in","title":"SVBONY 4mm 62° Aspheric Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eThree Focal Lengths: 4mm, 10mm, and 23mm\u003c\/li\u003e\n\u003cli\u003e62° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003eAspheric Lens Design\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated Optics\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" Barrel Diameter\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 1.25\" Eyepiece Set with 62° Aspheric Lens (4mm, 10mm, 23mm)\u003c\/h2\u003e\n\u003cp\u003eThis Svbony eyepiece set provides three distinct focal lengths—4mm, 10mm, and 23mm—to cover a full range of magnifications in any telescope with a 1.25\" focuser. Each eyepiece in the set features a 62° aspheric apparent field of view, delivering an immersive, wide-field image that reveals more of the sky than standard kit eyepieces.\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\u003eThe 62° Aspheric Field: A Wider Window on the Sky\u003c\/h3\u003e\n\u003cp\u003eThe 62° apparent field of view offers a noticeably more expansive window compared to traditional 50° Plössl designs, making it easier to frame large deep-sky objects or keep a planet centered at high power. The aspheric lens element helps to correct for spherical aberration, yielding sharper star points across a wider portion of the field than simpler designs in the same price class.\u003c\/p\u003e\n\u003cp\u003eWhile not providing the pinpoint edge-to-edge correction of premium multi-element eyepieces, this design delivers a significant optical upgrade for observers looking for a wide, comfortable view. Fully multi-coated lenses ensure high light transmission and contrast, darkening the sky background and making faint details on the Moon or in nebulae more apparent.\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\u003eFrom 4mm to 23mm: A Complete Magnification Set\u003c\/h3\u003e\n\u003cp\u003eThis set provides three of the most useful focal lengths for any observer, covering low, medium, and high power from a single kit.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e23mm Eyepiece:\u003c\/strong\u003e Your low-power scanning eyepiece. Use it to locate objects, view large open star clusters like the Pleiades (M45), or frame the entirety of the Andromeda Galaxy (M31) in smaller telescopes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm Eyepiece:\u003c\/strong\u003e The workhorse for medium magnification. This is an ideal focal length for resolving globular clusters like the Hercules Cluster (M13), studying details in the Orion Nebula (M42), or getting a closer look at lunar crater fields.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4mm Eyepiece:\u003c\/strong\u003e The high-power planetary and double-star specialist. When seeing conditions permit, the 4mm provides the magnification needed to resolve Jupiter's cloud bands, the Cassini Division in Saturn's rings, or split tight double stars like Albireo (Beta Cygni).\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhich Svbony 62° eyepiece is best for viewing planets like Jupiter in an 8\" f\/6 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e4mm Svbony 62° Aspheric eyepiece\u003c\/strong\u003e is the best choice for high-power planetary viewing. In an 8\" f\/6 Dobsonian (1200mm focal length), it will yield a magnification of 300x, which is ideal for resolving details like Jupiter's Great Red Spot and cloud bands, provided atmospheric seeing is steady.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the 23mm Svbony eyepiece perform on the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e23mm Svbony 62° eyepiece\u003c\/strong\u003e is excellent for large targets like the Andromeda Galaxy (M31). Its low power and wide 62° field of view will help you frame the full extent of the galaxy's core and faint outer arms, especially in a short focal length refractor or a rich-field Newtonian telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main benefit of an aspheric lens in this Svbony eyepiece set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn aspheric lens has a complex surface profile that corrects for spherical aberration more effectively than a simple spherical lens. In the Svbony 62° eyepieces, this results in sharper star images across more of the field of view, reducing the distortion you might see at the edges in a basic, low-cost wide-angle eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill these Svbony 1.25\" eyepieces fit my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, if your telescope uses a 1.25\" focuser or diagonal, this Svbony eyepiece set is fully compatible. The 1.25\" barrel is the most common standard for amateur telescopes, including most refractors, reflectors, and Schmidt-Cassegrains.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre these Svbony 62° eyepieces good for observers who wear glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile eye relief is not specified, eyepieces of this design typically have shorter eye relief, especially at the 4mm focal length. Eyeglass wearers may find it difficult to see the full 62° field of view. The 23mm will be the most comfortable, but for critical observing, you may need to remove your glasses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"fully multi-coated\" mean for the Svbony 62° eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eFully multi-coated\u003c\/strong\u003e means that all air-to-glass surfaces in the eyepiece have multiple layers of anti-reflection coatings applied. This process maximizes light transmission for brighter images and minimizes internal reflections, which improves contrast by reducing glare and ghosting.\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\u003eFocal Lengths\u003c\/td\u003e\n\u003ctd\u003e4mm, 10mm, 23mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e62°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e1.25\" (31.7mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003eAspheric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\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\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 Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861230252317,"sku":"SV-F9301AA","price":17.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-1-25-Eyepiece-62-Aspheric-Lens-4-10-23mm-Telescope-HD-1_e181bab2-a0c0-4260-99f3-ed786484f73c.jpg?v=1788659708"},{"product_id":"svbony-10mm-62-aspheric-eyepiece-125in","title":"SVBONY 10mm 62° Aspheric Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861231005981,"sku":"SV-F9301AB","price":16.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-23mm-62-aspheric-eyepiece-125in","title":"SVBONY 23mm 62° Aspheric Eyepiece - 1.25\"","description":"","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861231104285,"sku":"SV-F9301AC","price":17.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-sv131-32mm-48-plossl-eyepiece-125in","title":"SVBONY SV131 32mm 48° Plössl Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e32mm Focal Length\u003c\/li\u003e\n\u003cli\u003e48° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003e19mm Eye Relief\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated (FMC) Optics\u003c\/li\u003e\n\u003cli\u003eAccepts Standard 1.25\" Filters (M28.5*0.6)\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 SV131 Plossl Eyepiece 32mm 1.25inch 48 Degrees for Telescope\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV131 Plossl Eyepiece combines a 32mm focal length with a 48° apparent field of view, utilizing a 25mm field stop to deliver a wide true field in any 1.25-inch focuser. Its 4-element, 2-group optical design features fully multi-coated surfaces and provides a comfortable 19mm of eye relief, making it an excellent low-power eyepiece for extended deep-sky viewing sessions.\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\u003e32mm Focal Length: A Bright, 48° Field for Deep-Sky Sweeping\u003c\/h3\u003e\n\u003cp\u003eWith its 32mm focal length, the SV131 delivers low magnification and a bright image, making it ideal for locating celestial objects and observing large-scale deep-sky targets. The 25mm internal field stop is near the maximum possible for the 1.25-inch format, ensuring you see the widest possible true field of view for framing entire open clusters like the Pleiades (M45) or sprawling nebulae like the Orion Nebula (M42).\u003c\/p\u003e\n\u003cp\u003eThe classic 4-element Plössl design is enhanced with Fully Multi-Coated (FMC) optics and matte blackened lens edges. This combination maximizes light transmission and eliminates internal reflections, resulting in high-contrast views where faint objects stand out against a dark sky background.\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\u003e19mm Eye Relief and All-Metal Build\u003c\/h3\u003e\n\u003cp\u003eThe SV131 is designed for comfort during long nights at the telescope, featuring a generous 19mm of eye relief. This allows most observers, including those who wear eyeglasses for astigmatism, to see the entire 48° field of view without strain. A soft rubber eyecup helps to position your eye correctly and block stray light.\u003c\/p\u003e\n\u003cp\u003eBuilt from metal and optical glass, the eyepiece has a solid, durable feel. The barrel is chrome-plated for smooth operation in the focuser, and an eco-friendly rubber non-slip ring provides a secure grip, even with gloves on, preventing accidental drops on cold nights.\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\u003eSV131 32mm Plössl vs. Kit Eyepieces: A Worthy First Upgrade\u003c\/h3\u003e\n\u003cp\u003eCompared to the standard 20mm or 25mm eyepieces often included with beginner telescopes, the SVBONY SV131 32mm Plössl is a significant step up. It offers a wider true field of view, making it much easier to find objects and appreciate large star clusters and nebulae in their entirety.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider True Field:\u003c\/strong\u003e The 32mm focal length provides lower magnification, expanding the patch of sky you can see at one time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior Coatings:\u003c\/strong\u003e Fully Multi-Coated (FMC) optics transmit significantly more light and reduce glare compared to the single-coated or partially-coated lenses of most kit eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter Construction:\u003c\/strong\u003e The SV131's all-metal body and blackened lens edges offer improved durability and contrast over the often plastic-bodied kit eyepieces.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhat is the SVBONY SV131 32mm Plössl eyepiece best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV131 32mm is ideal for low-power, wide-field observing. It excels at viewing large deep-sky objects such as open star clusters, large nebulae like the North American Nebula (NGC 7000), and the Andromeda Galaxy (M31). It's also an excellent \"finder\" eyepiece for locating targets before switching to higher magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SVBONY SV131 32mm perform for viewing the Andromeda Galaxy (M31) in an 8-inch 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 with a 2000mm focal length, the SVBONY SV131 32mm will provide 62.5x magnification. This is an ideal power for framing the bright core and faint outer extensions of the Andromeda Galaxy (M31), making it a superb choice for this and other large galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the SVBONY SV131 32mm Plössl accept 1.25-inch filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 1.25-inch barrel is threaded with the standard \u003cstrong\u003eM28.5*0.6\u003c\/strong\u003e pitch, making it compatible with all standard 1.25-inch astronomy filters, such as light pollution, nebula, or planetary color filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV131 32mm a good upgrade from the 25mm eyepiece that came with my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. It is a very popular first upgrade. Compared to most 25mm kit eyepieces, the SVBONY SV131 offers a wider true field of view for easier object locating, lower magnification for brighter images of faint objects, and superior \u003cstrong\u003eFully Multi-Coated (FMC)\u003c\/strong\u003e optics for improved contrast and light transmission.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 19mm eye relief on the SVBONY SV131 32mm eyepiece suitable for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, \u003cstrong\u003e19mm of eye relief\u003c\/strong\u003e is considered long and is very comfortable for most observers who need to wear glasses to correct for astigmatism. You should be able to see the entire 48-degree field of view with your glasses on.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV131 32mm Plössl to find objects in my Dobsonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice for that purpose. The low power and wide field of view make the SVBONY SV131 32mm a perfect \"finder\" or \"sweeper\" eyepiece for a Dobsonian. It allows you to scan large areas of the Milky Way and easily star-hop to your desired target.\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\u003eEyepiece Type\u003c\/td\u003e\n\u003ctd\u003ePlossl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e32mm\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\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e48°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e4 Elements in 2 Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExit Pupil\u003c\/td\u003e\n\u003ctd\u003e23mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6 (Standard 1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Edge Treatment\u003c\/td\u003e\n\u003ctd\u003eMatt Blackened\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecup Type\u003c\/td\u003e\n\u003ctd\u003eRubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrip\u003c\/td\u003e\n\u003ctd\u003eNon-slip Cover\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eMetal \u0026amp; Optical Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e116.5 g \/ 4.11 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eØ61 x 104mm\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\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":52861231169821,"sku":"SV-W9101A","price":34.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV131-Plossl-Eyepiece-32mm-1-25inch-48-Degrees-for-Telescope-1_cd56b83a-0f97-499f-958d-449bf3788393.jpg?v=1788883225"},{"product_id":"svbony-sv131-6mm-48-plossl-eyepiece-125in","title":"SVBONY SV131 6mm 48° Plössl Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAvailable in 6mm, 12mm, 17mm, 25mm, and 40mm Focal Lengths\u003c\/li\u003e\n\u003cli\u003eClassic 4-Element, 2-Group Plössl Optical Design\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter Fits Standard Focusers\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated (FMC) Optics for Clear Views\u003c\/li\u003e\n\u003cli\u003e19mm Eye Relief for Comfortable Observation\u003c\/li\u003e\n\u003cli\u003eStandard M28.5*0.6 Filter Threads\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 SV131 1.25\" Plossl Eyepiece (6\/12\/17\/25\/40mm)\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV131 1.25\" Plössl Eyepiece series offers a significant upgrade over standard kit eyepieces, featuring a classic 4-element, 2-group optical design across its 6mm, 12mm, 17mm, 25mm, and 40mm focal lengths. With a generous 19mm of eye relief and standard M28.5*0.6 threads for 1.25\" filters, these eyepieces are built for comfortable, high-contrast views of a wide range of celestial objects.\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\u003eClassic 4-Element Plössl Optics with Full Multi-Coatings\u003c\/h3\u003e\n\u003cp\u003eThe SV131 series adheres to the time-tested 4-element, 2-group Plössl design, known for delivering sharp, well-corrected images. Svbony enhances this design with True FMC (Fully Multi-Coated) optics, which increases light transmission and reduces internal reflections for brighter, higher-contrast views. The lens edges are also blackened to further minimize stray light and improve image clarity, making them effective for observing faint deep-sky objects.\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\u003eDurable All-Metal Build with M28.5*0.6 Filter Threads\u003c\/h3\u003e\n\u003cp\u003eUnlike many eyepieces included with beginner telescopes, the SV131 features a full-metal housing with a chrome-plated 1.25\" barrel for durability and a secure fit in your focuser. The barrel is threaded with the standard M28.5*0.6 pitch, allowing you to easily attach any 1.25\" planetary, nebula, or polarizing filter. The interior of the housing is matted to prevent internal reflections from degrading the image.\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\u003eComfortable Viewing with 19mm of Eye Relief\u003c\/h3\u003e\n\u003cp\u003eA notable feature of the SV131 design is its 19mm of eye relief, which allows you to position your eye at a comfortable distance from the lens without straining to see the full field. This is a significant advantage over many short focal length Plössls that have very tight eye relief. This design reduces eye fatigue during long observing sessions and makes viewing easier for those who wear glasses.\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\u003eSvbony SV131 vs. Standard Kit Eyepieces: A Worthwhile Upgrade\u003c\/h3\u003e\n\u003cp\u003eIf your telescope came with basic Kellner or Huygens eyepieces, the Svbony SV131 Plössl series represents a clear step up in optical and build quality without a premium price tag. The key differences are immediately noticeable at the eyepiece.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Coatings:\u003c\/strong\u003e Most kit eyepieces are only single-coated or partially coated, leading to dimmer views and more glare. The SV131's Fully Multi-Coated optics deliver visibly brighter and higher-contrast images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuild Materials:\u003c\/strong\u003e The all-metal construction of the SV131 is more robust than the plastic bodies of many bundled eyepieces, ensuring longevity and a more solid feel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Baffling:\u003c\/strong\u003e The matte blackened interior and lens edges in the SV131 provide better stray light control, resulting in a darker sky background and making it easier to see faint details.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhich Svbony SV131 focal length is best for viewing Saturn with my 6\" f\/8 reflector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor high-power planetary viewing, the \u003cstrong\u003e6mm Svbony SV131\u003c\/strong\u003e is an excellent choice. In a 6\" f\/8 telescope (1200mm focal length), it will provide 200x magnification (1200mm \/ 6mm), which is ideal for resolving details like the Cassini Division in Saturn's rings or cloud bands on Jupiter under good seeing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 40mm Svbony SV131 to see the entire Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003e40mm SV131\u003c\/strong\u003e is designed for wide-field views of large deep-sky objects. In most telescopes, it will provide the lowest magnification and widest true field of view in the 1.25\" format, making it perfect for framing the full extent of the Andromeda Galaxy (M31), the Pleiades (M45), or sweeping through the Milky Way.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 4-element, 2-group design of the SV131 Plössl mean for my views?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is the classic Plössl optical formula, consisting of two cemented doublet lenses. It is highly regarded for its excellent on-axis sharpness, good color correction, and high light transmission due to the low number of glass-to-air surfaces. It provides a clean, clear view that is a significant improvement over simpler 2- or 3-element eyepiece designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 19mm eye relief on the SV131 Plössl comfortable for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, with \u003cstrong\u003e19mm of eye relief\u003c\/strong\u003e, the SV131 series is generally very comfortable for observers who wear glasses. You should be able to see the entire field of view with your glasses on, which is often not possible with eyepieces that have shorter eye relief (typically under 15mm).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach a 1.25\" filter to the Svbony SV131 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe bottom of the silver 1.25\" barrel on every Svbony SV131 eyepiece is threaded with standard \u003cstrong\u003eM28.5*0.6 threads\u003c\/strong\u003e. You can simply screw any standard 1.25\" astronomy filter, such as a moon filter or a light pollution filter, directly into these threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the benefits of Fully Multi-Coated (FMC) optics on the SV131?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eFully Multi-Coated (FMC)\u003c\/strong\u003e means that all glass-to-air surfaces have been coated with multiple layers of anti-reflective material. This dramatically increases light transmission to your eye and reduces glare and ghosting from internal reflections. The result is a brighter, sharper, and higher-contrast image compared to eyepieces with single or partial coatings.\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\u003eFocal Lengths\u003c\/td\u003e\n\u003ctd\u003e6mm, 12mm, 17mm, 25mm, 40mm\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 Design\u003c\/td\u003e\n\u003ctd\u003e4-Element, 2-Group Plössl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6 (Standard for 1.25\" filters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Edge Blackening\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eAll-metal\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\"\u003eSV131 1.25\" Plössl Eyepiece (Selected Focal Length)\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\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":52861231235357,"sku":"SV-W9101B","price":19.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV131-1-25-Plossl-Eyepiece-6-12-17-25-40mm-for-Telescope-1_7625733a-c728-4db0-bd8a-2ebc637f6273.jpg?v=1788659733"},{"product_id":"svbony-sv131-12mm-48-plossl-eyepiece-125in","title":"SVBONY SV131 12mm 48° Plössl Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eClassic Plossl Optical Design\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated (FMC) Optics\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" Barrel with Filter Threads\u003c\/li\u003e\n\u003cli\u003eAll-Metal Construction\u003c\/li\u003e\n\u003cli\u003eBlackened Lens Edges to Reduce Internal Reflections\u003c\/li\u003e\n\u003cli\u003eRubber Anti-Slip Grip\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 SV131 1.25\" Plossl Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV131 1.25\" Plossl Eyepiece series offers a classic, reliable optical design ideal for a wide range of astronomical viewing. With fully multi-coated optics and blackened lens edges, these eyepieces are engineered to deliver bright, high-contrast images of deep-sky objects like nebulae and star clusters. The standard 1.25-inch barrel is threaded for filters, and the robust all-metal construction ensures durability at the telescope.\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\u003eSV131 Optical System: A High-Contrast Plossl Design\u003c\/h3\u003e\n\u003cp\u003eThe SV131 series uses the proven four-element Plossl optical design, known for providing sharp, well-corrected views. Every air-to-glass surface features true full-bandwidth multi-layer coatings (FMC) to boost light transmission and image brightness. To further improve contrast and eliminate internal reflections that can wash out faint details, the lens edges are carefully blackened.\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\u003eRobust Construction for Reliable Field Use\u003c\/h3\u003e\n\u003cp\u003eBuilt for durability, each Svbony SV131 eyepiece features an all-metal body with a chrome-plated barrel that resists wear. The interior of the barrel is matte-blackened with threading to trap stray light before it reaches the eye. An eco-friendly rubber anti-slip ring provides a secure grip, even with gloves on, preventing accidental drops during cold nights.\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\u003eComfortable Viewing with Standard 1.25\" Filter Threads\u003c\/h3\u003e\n\u003cp\u003eThese eyepieces are designed for comfortable, long observing sessions, offering generous eye relief that helps reduce eye fatigue. The standard 1.25\" barrel format ensures compatibility with virtually any telescope focuser or diagonal. Each eyepiece includes standard M28.5x0.6 filter threads, allowing you to easily attach color planetary filters or light pollution filters to enhance your views.\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\"\u003eWhat makes the Svbony SV131 Plossl a good choice for deep-sky objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003efully multi-coated optics\u003c\/strong\u003e and \u003cstrong\u003eblackened lens edges\u003c\/strong\u003e maximize light transmission and contrast. This makes the Svbony SV131 effective for viewing faint, diffuse objects like galaxies, star clusters such as the Pleiades (M45), and nebulae like the Orion Nebula (M42).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the build quality of the Svbony SV131 eyepiece contribute to observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eall-metal construction\u003c\/strong\u003e provides durability for field use, while the \u003cstrong\u003echrome-plated barrel\u003c\/strong\u003e resists scratches. The \u003cstrong\u003erubber anti-slip grip\u003c\/strong\u003e ensures secure handling, which is especially useful in cold or damp conditions, preventing accidental drops that could damage the eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the Svbony SV131 Plossl eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Each Svbony SV131 eyepiece has a \u003cstrong\u003estandard 1.25-inch barrel\u003c\/strong\u003e that is threaded to accept M28.5x0.6 filters. This allows you to use a wide variety of standard astronomical filters, such as light pollution, color, or nebula filters, to enhance specific details on celestial objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main trade-off of a Plossl design like the SV131?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary trade-off for a classic Plossl eyepiece is the apparent field of view, which is typically around 50 degrees. While this provides a sharp and bright image, it is narrower than more complex and expensive wide-field eyepiece designs. However, for many observers, the excellent on-axis sharpness and contrast of a Plossl are preferable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would a longer focal length Svbony SV131 eyepiece perform in my 8-inch f\/6 Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA longer focal length SV131, like a 25mm or 40mm model, would provide low magnification and a wide true field of view in your Dobsonian. This makes it an excellent \"finder\" eyepiece for locating objects and for observing large star clusters or extended nebulae like the North American Nebula (NGC 7000) in their entirety.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs a shorter focal length Svbony SV131 eyepiece good for viewing Saturn's rings with a 102mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, a shorter focal length model from the Svbony SV131 series, such as a 6mm or 12mm, would provide higher magnification suitable for planetary viewing. In a 102mm refractor, it would allow you to resolve details like Saturn's rings, the Cassini Division (on nights of good seeing), and Jupiter's main cloud bands and Galilean moons.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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":52861231399197,"sku":"SV-W9101C","price":25.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-sv131-17mm-48-plossl-eyepiece-125in","title":"SVBONY SV131 17mm 48° Plössl Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eClassic 4-Element Plössl Optical Design\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated (FMC) Optics\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" Barrel with M28.5*0.6 Filter Threads\u003c\/li\u003e\n\u003cli\u003eAll-Metal Construction with Rubber Grip\u003c\/li\u003e\n\u003cli\u003eBlackened Lens Edges to Reduce Internal Reflections\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 SV131 1.25\" Plossl Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV131 1.25\" Plossl Eyepiece series uses a classic 4-element optical design to deliver bright, high-contrast views, making it an excellent upgrade from standard kit eyepieces. With a standard M28.5*0.6 filter thread, each eyepiece in the SV131 series accepts all 1.25-inch filters for enhancing contrast on nebulae and planets.\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\u003e4-Element Plössl Optics: FMC Coatings and Baffling\u003c\/h3\u003e\n\u003cp\u003eThe SV131 is built around the time-tested 4-element, 2-group Plössl design, known for its sharp on-axis views and excellent light transmission. Svbony enhances this design with fully multi-coated (FMC) optics to maximize brightness and contrast, which is critical for resolving faint detail in deep-sky objects like star clusters and galaxies. To further improve image quality, the lens edges are blackened to eliminate stray light and internal reflections that can wash out faint details.\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\u003e1.25-Inch All-Metal Body with Filter Threads\u003c\/h3\u003e\n\u003cp\u003eThe eyepiece features a durable, all-metal housing with a chrome-plated 1.25-inch barrel that resists wear and provides a secure fit in any standard focuser or diagonal. The interior of the barrel is matte-threaded to absorb off-axis light, ensuring a dark background sky. For secure handling, even with gloves on, an eco-friendly rubber anti-slip ring provides a confident grip and helps prevent accidental drops.\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\u003eSV131 Plössl vs. Other Eyepiece Designs: Where It Fits\u003c\/h3\u003e\n\u003cp\u003eWhile advanced wide-field eyepieces offer a more immersive experience, they come at a significantly higher cost and complexity. The Plössl design strikes a critical balance, delivering far better correction and sharpness than simpler Kellner or Huygens eyepieces that are often included with beginner telescopes. The SV131 Plössl is the logical next step for an observer wanting to see what their telescope is truly capable of without a major investment. The primary trade-off is typically a tighter eye relief compared to more expensive, complex designs, particularly in the shorter focal lengths.\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\"\u003eWhat makes the Svbony SV131 Plössl a good choice for deep-sky observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Svbony SV131's \u003cstrong\u003e4-element Plössl design\u003c\/strong\u003e and \u003cstrong\u003efully multi-coated optics\u003c\/strong\u003e maximize light transmission and contrast. This makes it easier to see faint details in nebulae, star clusters, and galaxies compared to basic kit eyepieces. The blackened lens edges also contribute to a darker background, making faint objects stand out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the Svbony SV131 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Svbony SV131 features a standard \u003cstrong\u003e1.25-inch barrel\u003c\/strong\u003e with \u003cstrong\u003eM28.5*0.6 threads\u003c\/strong\u003e, making it compatible with all standard 1.25-inch astronomy filters. This allows you to use nebula filters like a UHC or O-III to improve views of emission nebulae, or colored filters to enhance details on planets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Svbony SV131 Plössl compare to the eyepieces that came with my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMost entry-level telescopes come with simpler eyepiece designs like Kellner or Ramsden. The Svbony SV131 Plössl offers a significant upgrade in image sharpness, color correction, and contrast due to its more advanced 4-element design and superior coatings. You will likely notice sharper stars, especially towards the edge of the field, and better overall image brightness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich Svbony SV131 focal length is best for viewing the Orion Nebula (M42) in an 8\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a large object like the Orion Nebula (M42) in a typical 8\" f\/6 Dobsonian, a lower-power eyepiece is ideal for framing the entire structure. A focal length in the \u003cstrong\u003e25mm to 40mm range\u003c\/strong\u003e from the SV131 series would provide a wide field of view to see the nebula and its surrounding stars. A mid-power eyepiece, like a 17mm, would then be excellent for getting a closer look at the Trapezium star cluster at its core.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Svbony SV131 eyepiece work for planetary viewing of Jupiter in my 90mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. For planetary viewing, higher magnification is needed to resolve details like Jupiter's cloud bands or Saturn's rings. In a 90mm refractor (which typically has a focal length around 900mm), the shorter focal length eyepieces from the Svbony SV131 series, such as the \u003cstrong\u003e6mm or 12mm\u003c\/strong\u003e, would provide the necessary magnification for detailed planetary observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the all-metal construction on the Svbony SV131?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe all-metal construction provides durability and a solid feel. Unlike plastic eyepieces, the metal body is more resistant to temperature changes and physical damage. The chrome-plated barrel ensures a smooth, non-binding fit in your telescope's focuser for years of reliable use.\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\u003eSpecifications\u003c\/td\u003e\n\u003ctd\u003eData not available.\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\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":52861231497501,"sku":"SV-W9101D","price":24.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-sv131-25mm-48-plossl-eyepiece-125in","title":"SVBONY SV131 25mm 48° Plössl Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eClassic 4-Element Plössl Optical Design\u003c\/li\u003e\n\u003cli\u003eAvailable in 6, 12, 17, 25, and 40mm Focal Lengths\u003c\/li\u003e\n\u003cli\u003eStandard 1.25-Inch Barrel Format\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated (FMC) Optics\u003c\/li\u003e\n\u003cli\u003eAccepts Standard 1.25\" (M28.5*0.6) Filters\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 SV131 1.25\" Plossl Eyepiece (6\/12\/17\/25\/40mm)\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV131 1.25\" Plössl Eyepiece series packages a classic 4-element optical design into a modern, all-metal housing suitable for any telescope with a 1.25-inch focuser. Each eyepiece in the series, including the popular 25mm model, features standard M28.5*0.6 filter threads, allowing you to easily attach nebula or light pollution filters to enhance your views of deep-sky objects.\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\u003eA 4-Element Design with Fully Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eThe SV131 eyepieces are built around the time-tested 4-element Plössl optical configuration, known for delivering sharp, high-contrast images. Svbony enhances this classic design with true full-bandwidth multi-layer coatings (FMC) on all air-to-glass surfaces. This treatment maximizes light transmission and, combined with matte blackened lens edges, effectively suppresses internal reflections and stray light for a cleaner, higher-contrast view.\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\u003eAll-Metal Construction in a 1.25-Inch Barrel\u003c\/h3\u003e\n\u003cp\u003eDurability is central to the SV131's design, which features an all-metal body and a chrome-plated 1.25-inch barrel that resists wear and provides a secure fit in your focuser. The interior of the barrel is matte-threaded to further reduce glare. For handling in the dark, an eco-friendly rubber anti-slip ring ensures a secure grip, preventing accidental drops during cold nights or when wearing gloves.\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\u003eDeep-Sky Viewing with M28.5*0.6 Filter Threads\u003c\/h3\u003e\n\u003cp\u003eThese eyepieces are well-suited for observing diffuse, low-surface-brightness targets like nebulae and star clusters. The design prioritizes a bright, clear field of view for comfortable, extended observing sessions. The inclusion of a standard M28.5*0.6 thread on the 1.25-inch barrel means you can easily add filters to combat light pollution or isolate specific wavelengths, making targets like the Orion Nebula (M42) or the Dumbbell Nebula (M27) stand out against the background sky.\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\"\u003eWhich Svbony SV131 focal length is best for locating objects in my 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor an 8\" f\/10 SCT, the \u003cstrong\u003e40mm or 25mm SV131 Plössl\u003c\/strong\u003e would be your best choice for a low-power \"finder\" eyepiece. These focal lengths provide a wider true field of view, making it much easier to scan the sky and locate deep-sky objects before switching to higher magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the Svbony SV131 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. All Svbony SV131 eyepieces feature a standard \u003cstrong\u003eM28.5*0.6 thread\u003c\/strong\u003e on the inside of the 1.25-inch barrel. This allows you to attach any standard 1.25-inch astronomy filter, such as a light pollution filter, a nebula filter (like an O-III or UHC), or a colored planetary filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the SV131 Plössl a good choice for viewing the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Andromeda Galaxy (M31) is a large, dim object that requires a bright, wide field of view. The SV131's fully multi-coated, 4-element optics deliver excellent light transmission, which is crucial for seeing the galaxy's faint outer arms. Using a lower-power model like the 40mm or 25mm will help you frame the entire galaxy in your field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Svbony SV131 comfortable for long observing sessions?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SV131 series is designed for comfortable observation. While specific eye relief varies by focal length, the optical design is intended to reduce eye fatigue during extended viewing sessions, making them a practical choice for nights spent exploring star clusters and nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the optical design of the Svbony SV131 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV131 uses a classic \u003cstrong\u003ePlössl design\u003c\/strong\u003e, which consists of four optical elements arranged in two groups (two cemented doublets). This design is highly regarded for providing sharp, high-contrast views, especially for planetary and deep-sky observation, with good control over chromatic aberration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the build quality of the SV131 hold up to frequent use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Svbony SV131 is built for durability. It features an \u003cstrong\u003eall-metal housing\u003c\/strong\u003e, a chrome-plated barrel to prevent scratching, and matte-blackened internal surfaces to improve contrast. The addition of a rubber grip ring also helps protect it from accidental drops, ensuring it can withstand regular use in the field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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":52861231530269,"sku":"SV-W9101E","price":27.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-sv131-40mm-48-plossl-eyepiece-125in","title":"SVBONY SV131 40mm 48° Plössl Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eClassic Plössl Optical Design\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated (FMC) Lenses\u003c\/li\u003e\n\u003cli\u003eAccepts Standard 1.25-inch Filters\u003c\/li\u003e\n\u003cli\u003eAll-Metal Barrel Construction\u003c\/li\u003e\n\u003cli\u003eAnti-Slip Rubber Grip\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 SV131 1.25\" Plossl Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV131 1.25\" Plossl Eyepiece series offers a classic and reliable design for general-purpose astronomical viewing. Engineered for bright, clear fields of view, these eyepieces are an excellent choice for observing deep-sky objects like nebulae and star clusters. The combination of a proven optical formula and modern manufacturing delivers a comfortable and effective viewing experience.\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\u003eBright Views from Fully Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eThe SV131 Plössl eyepieces feature a true full-bandwidth, multi-layer coating (FMC) on all air-to-glass surfaces. This treatment maximizes light transmission, resulting in brighter images and higher contrast, which is critical for teasing out faint details in galaxies and nebulae. To further enhance contrast, the lens edges are blackened to eliminate internal reflections and stray light that can wash out the view.\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\u003eAll-Metal Body with Secure Grip\u003c\/h3\u003e\n\u003cp\u003eBuilt for durability, the Svbony SV131 features an all-metal structure with a chrome-plated 1.25-inch barrel. The barrel is threaded to accept standard M28.5*0.6 pitch filters, allowing you to easily add nebula or color filters to your setup. For secure handling in the dark or with gloves on, the eyepiece is finished with an eco-friendly rubber anti-slip ring, reducing the risk of accidental drops.\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\"\u003eWhat makes the Svbony SV131 Plössl good for deep-sky objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003efully multi-coated (FMC) optics\u003c\/strong\u003e maximize light transmission, which is crucial for seeing faint objects like nebulae and galaxies. The blackened lens edges also improve contrast by reducing internal reflections, helping these faint targets stand out against the dark sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the all-metal construction on the SV131 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe all-metal body and chrome-plated barrel ensure the Svbony SV131 is durable and can withstand regular use in the field. This robust construction provides a more solid feel and better longevity compared to eyepieces with plastic components.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the rubber grip on the Svbony SV131 help during an observing session?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe anti-slip rubber ring provides a secure grip, which is especially useful in cold or damp conditions when handling equipment can be difficult. It makes changing eyepieces safer and easier, even when wearing gloves.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the Svbony SV131 1.25\" Plossl Eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 1.25-inch barrel of the SV131 is threaded with the standard M28.5*0.6 pitch, making it compatible with all standard 1.25-inch astronomical filters, such as light pollution, nebula, or planetary color filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Svbony SV131 perform for viewing the Orion Nebula (M42) in a 10\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a 10\" Dobsonian, an SV131 Plössl would provide bright, high-contrast views of the Orion Nebula (M42). A lower-power focal length would frame the entire nebula, while a higher-power version would allow you to resolve the Trapezium stars at its core. The FMC coatings are essential for revealing the faint, wispy details in the nebula's outer regions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Svbony SV131 a good choice for observing Jupiter with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. A shorter focal length SV131 Plössl would be a good choice for planetary viewing in an 8\" SCT. The classic Plössl design provides sharp, on-axis views, which are ideal for discerning details like Jupiter's cloud bands and the Great Red Spot. The high light transmission will also help with observing Jupiter's moons.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSvbony 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861231563037,"sku":"SV-W9101F","price":36.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV131-1-25-Plossl-Eyepiece-6-12-17-25-40mm-for-Telescope-1-W9101C_288dff12-e056-4837-b5aa-016d1af96471.jpg?v=1788883251"},{"product_id":"svbony-sv135-7-21mm-zoom-eyepiece-125in","title":"SVBONY SV135 7-21mm Zoom Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e7mm to 21mm linear zoom range\u003c\/li\u003e\n\u003cli\u003e57° (at 21mm) to 40° (at 7mm) apparent field of view\u003c\/li\u003e\n\u003cli\u003e1.25\" barrel fits any standard focuser\u003c\/li\u003e\n\u003cli\u003e18mm to 16.3mm eye relief for viewing comfort\u003c\/li\u003e\n\u003cli\u003eThreaded for standard M28.5*0.6 (1.25\") filters\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 SV135 1.25\" 7-21mm Zoom Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV135 zoom eyepiece replaces an entire set of eyepieces, offering a continuous focal length range from 7mm to 21mm in a single, 133g unit. Its linear zoom mechanism provides a wide 57° field at 21mm for locating objects, which smoothly narrows to a 40° field for high-magnification views at 7mm. With a comfortable 18mm to 16.3mm of eye relief and a standard 1.25\" barrel, this eyepiece delivers instant magnification changes without swapping gear.\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\u003eOne Eyepiece, Multiple Magnifications: The 7-21mm Zoom Range\u003c\/h3\u003e\n\u003cp\u003eThe core of the SV135's utility is its 7-21mm zoom range, which eliminates the need to carry and switch between multiple eyepieces. You can start at the 21mm setting to get a wide, low-power view for finding your target, then simply twist the barrel to zoom in to 7mm for detailed, high-power observation. This is ideal for tracking planets as they drift or for quickly framing different features on the Moon without losing your target.\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\u003eFully Multi-Coated Optics: From a 57° View to 40°\u003c\/h3\u003e\n\u003cp\u003eThe SV135's 6-element, 4-group optical design features fully multi-coated (FMC) surfaces to maximize light transmission and contrast. At 21mm, you get an expansive 57° apparent field of view, perfect for sweeping star fields. As you increase magnification to 7mm, the field of view narrows to 40°, a necessary trade-off for the zoom mechanism that keeps the image sharp and focused through the range.\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\u003e18mm Eye Relief and a 1.25\" Filter-Ready Barrel\u003c\/h3\u003e\n\u003cp\u003eDesigned for practical use, the SV135 provides a generous 18mm of eye relief at its lowest power, dipping only slightly to 16.3mm at 7mm, ensuring comfortable views even for observers wearing glasses. The standard 1.25\" barrel is threaded with M28.5*0.6 threads, making it compatible with all standard 1.25\" filters, like a moon filter or light pollution filter, to enhance your views.\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\u003eSVBONY SV135 vs. A Plössl Kit: Convenience vs. Field of View\u003c\/h3\u003e\n\u003cp\u003eA zoom eyepiece is a direct alternative to owning several fixed focal length eyepieces. Compared to a standard kit of three Plössls (e.g., 20mm, 12mm, 7mm), the SV135 offers unmatched convenience. There's no fumbling in the dark, no risk of dropping an eyepiece, and no need to re-acquire your target after a swap.\u003c\/p\u003e\n\u003cp\u003eThe primary trade-off is the apparent field of view. While the SV135 offers a wide 57° at 21mm, most fixed Plössls maintain a ~50° field across all focal lengths. The SV135's field narrows to 40° at 7mm, which is more constrained than a dedicated 7mm Plössl. For travel, outreach, or grab-and-go observing, the SV135's convenience is a clear winner; for critical observation where field of view is paramount, fixed eyepieces have an edge.\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\"\u003eWhat is the main advantage of the SVBONY SV135 zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main advantage is convenience. The \u003cstrong\u003eSVBONY SV135\u003c\/strong\u003e combines multiple magnifications into one unit with its \u003cstrong\u003e7mm to 21mm\u003c\/strong\u003e zoom range. This allows you to find an object at low power and zoom in for a closer look without ever removing the eyepiece from the focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the field of view change when I zoom the SVBONY SV135?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a key characteristic of most zoom eyepieces. The \u003cstrong\u003eSVBONY SV135\u003c\/strong\u003e has its widest apparent field of view, \u003cstrong\u003e57°\u003c\/strong\u003e, at the 21mm setting (lowest power). As you zoom in to the 7mm setting (highest power), the field of view narrows to \u003cstrong\u003e40°\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SVBONY SV135 perform on the Moon with an 80mm f\/7 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eSVBONY SV135\u003c\/strong\u003e is an excellent choice for lunar observing with a small refractor. At 21mm, you'll see the entire lunar disk with context. You can then zoom in smoothly towards 7mm to get high-power views of specific craters, rilles, and mountain ranges along the terminator, all without changing eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV135 a good choice for viewing Jupiter's moons in a 6\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. In a typical 6\" f\/8 Dobsonian, the \u003cstrong\u003eSVBONY SV135\u003c\/strong\u003e provides a magnification range from about 57x to 171x. You can use the 21mm setting to easily frame Jupiter and all four Galilean moons, then zoom in to the 7mm or 10mm range to resolve cloud bands on the planet itself. The ability to adjust magnification on the fly is very helpful with non-driven mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the SVBONY SV135 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 1.25\" barrel of the \u003cstrong\u003eSVBONY SV135\u003c\/strong\u003e is threaded with standard \u003cstrong\u003eM28.5*0.6\u003c\/strong\u003e threads. This allows you to attach any standard 1.25\" astronomy filter, such as a moon filter for reducing glare or a color filter for enhancing planetary detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the image through the SVBONY SV135 as sharp as a fixed focal length eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the \u003cstrong\u003eSVBONY SV135\u003c\/strong\u003e offers excellent views for its price, a high-quality fixed focal length eyepiece will typically have a slight edge in sharpness and a wider apparent field of view, especially at higher magnifications. The SV135 is designed to prioritize convenience and flexibility, making it a fantastic all-in-one accessory for many observing situations.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e7mm - 21mm\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\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e57° - 40°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e18mm - 16.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003e6 Elements in 4 Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZoom Type\u003c\/td\u003e\n\u003ctd\u003eLinear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Guard\u003c\/td\u003e\n\u003ctd\u003eYes, Rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterpupillary Distance\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eMetal and Optical Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e93mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e133g \/ 4.67oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\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\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 Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861231595805,"sku":"SV-W9105A","price":59.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV135-1-25-7-21mm-Zoom-Eyepiece-FMC-Telescope-Eyepiece-Kit-1_927c88df-5644-49c3-8580-e63aa612247c.jpg?v=1788883310"},{"product_id":"svbony-sv135-7-21mm-52-36-zoom-eyepiece-125in","title":"SVBONY SV135 7-21mm 52-36° Zoom Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e7mm to 21mm zoom focal length\u003c\/li\u003e\n\u003cli\u003e60° (at 21mm) to 40° (at 7mm) apparent field of view\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" barrel size\u003c\/li\u003e\n\u003cli\u003e13mm - 15mm of eye relief\u003c\/li\u003e\n\u003cli\u003eFully multi-coated optics 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\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 SV135 1.25\" 7-21mm Zoom Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV135 1.25\" 7-21mm Zoom Eyepiece replaces a whole set of fixed eyepieces, offering a continuous focal length range from 7mm to 21mm with a simple twist. Its 7-element, 4-group optical design is fully multi-coated, delivering a 60° field of view at its widest setting. With 13mm to 15mm of eye relief and a weight of just 145g, it provides a versatile and comfortable viewing experience for planetary and lunar observation.\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\u003eThe 7-21mm Zoom Range: Instant Magnification Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe core advantage of the SV135 is its ability to change magnification without swapping eyepieces. You can start at the 21mm setting for a wide, low-power view to easily locate an object like Saturn, then simply twist the barrel to zoom in to 7mm for a high-power, detailed view of the rings—all without ever taking your eye from the telescope or losing the object from the field.\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\u003e60°-40° Field of View and Fully Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eThe SV135's 7-element optical system is fully multi-coated to maximize light transmission and contrast, which is critical for discerning faint details on Jupiter's cloud bands or resolving stars in tight clusters. The apparent field of view varies with magnification, from a wide 60° at 21mm to a more focused 40° at 7mm. This is a necessary trade-off in a zoom design, prioritizing magnification power at the high end.\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\u003eErgonomics for Viewing: 15mm Eye Relief and 1.25\" Filter Threads\u003c\/h3\u003e\n\u003cp\u003eWith an eye relief range of 13mm to 15mm, the SV135 is comfortable for most observers, including those who wear glasses. A twist-up rubber eye guard helps block stray light and maintain proper eye positioning. The standard 1.25\" barrel is compatible with virtually any telescope, and the M28.5*0.6 threads allow you to attach standard 1.25\" filters, like a moon filter for reducing glare.\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\u003eSV135 Zoom vs. Fixed Focal Length Eyepieces: The Convenience Trade-Off\u003c\/h3\u003e\n\u003cp\u003eWhile a set of individual Plössl eyepieces might offer a wider, flatter field at each specific focal length, the SV135 zoom offers unparalleled convenience. It is an ideal solution for public outreach, travel scopes, or for observers who want to quickly find the optimal magnification for changing atmospheric conditions without carrying a case full of accessories.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvantage of the SV135:\u003c\/strong\u003e One eyepiece covers a wide range of magnifications, is cost-effective, and simplifies your observing kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvantage of Fixed Eyepieces:\u003c\/strong\u003e Typically provide a wider apparent field of view and potentially sharper edge-of-field correction compared to a zoom at the same focal length.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhat is the main advantage of the Svbony SV135 zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of the \u003cstrong\u003eSvbony SV135\u003c\/strong\u003e is convenience. It allows you to change magnification from a low-power \u003cstrong\u003e21mm\u003c\/strong\u003e to a high-power \u003cstrong\u003e7mm\u003c\/strong\u003e with a simple twist, eliminating the need to swap between multiple fixed-focal-length eyepieces. This is ideal for tracking objects or finding the perfect magnification for current seeing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the field of view of the SV135 change when I zoom?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe apparent field of view (AFOV) on the \u003cstrong\u003eSV135\u003c\/strong\u003e is variable. It is at its widest, \u003cstrong\u003e60°\u003c\/strong\u003e, at the 21mm setting. As you increase magnification by twisting towards the 7mm setting, the field of view narrows to \u003cstrong\u003e40°\u003c\/strong\u003e. This is a common characteristic of zoom eyepiece designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 13-15mm eye relief on the SV135 comfortable for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003e13mm - 15mm\u003c\/strong\u003e eye relief is generally sufficient for most eyeglass wearers to see the majority of the field of view comfortably. The adjustable rubber eye guard also helps in finding the optimal viewing distance from the lens.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the SV135 zoom eyepiece to observe Jupiter with an 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an 8\" f\/10 SCT (2032mm focal length), you would start with the \u003cstrong\u003eSvbony SV135\u003c\/strong\u003e at the 21mm setting to get a wide, low-power view (97x magnification) to easily find and center Jupiter. Once centered, you can smoothly twist the eyepiece towards 7mm, increasing the magnification up to 290x to see details like the Great Red Spot and individual cloud bands, stopping at the point where the image is sharpest based on atmospheric conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the SV135 eyepiece show the entire Pleiades (M45) cluster in a small refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt depends on the refractor's focal length. The Pleiades (M45) is a very large cluster, requiring a wide true field of view. At its 21mm setting with a \u003cstrong\u003e60°\u003c\/strong\u003e apparent field, the \u003cstrong\u003eSV135\u003c\/strong\u003e may frame the cluster in a short focal length refractor (e.g., 400-500mm). However, in longer focal length telescopes, a fixed eyepiece with a wider field stop, like a 32mm Plössl, would be better suited for viewing the entire cluster at once.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use standard 1.25\" filters with the Svbony SV135?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The barrel of the \u003cstrong\u003eSvbony SV135\u003c\/strong\u003e is threaded with the standard \u003cstrong\u003eM28.5*0.6\u003c\/strong\u003e pitch, making it compatible with all standard 1.25\" astronomy filters, such as moon filters, color filters for planets, or light pollution filters.\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eW9105D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e7mm - 21mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e60° - 40°\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\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e13mm - 15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003e7 elements in 4 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated Green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZoom Type\u003c\/td\u003e\n\u003ctd\u003eLinear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRubber Eye Guard\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eMetal + Optical Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e145g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Dimensions\u003c\/td\u003e\n\u003ctd\u003e110 x 80 x 70mm\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\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":52861231628573,"sku":"SV-W9105B","price":38.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-sv135-7-21mm-60-40-zoom-eyepiece-125in","title":"SVBONY SV135 7-21mm 60-40° Zoom Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e7mm to 21mm continuous zoom focal length\u003c\/li\u003e\n\u003cli\u003e57° to 40° variable apparent field of view\u003c\/li\u003e\n\u003cli\u003e18mm to 16.3mm of consistent eye relief\u003c\/li\u003e\n\u003cli\u003eFully multi-coated (FMC) 6-element optics\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" barrel with M28.5*0.6 filter threads\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 SV135 1.25\" 7-21mm Zoom Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV135 1.25\" Zoom Eyepiece replaces a case full of eyepieces with a single, versatile unit, offering a continuous focal length from 7mm to 21mm. Its 6-element, 4-group optical design delivers a variable apparent field of view from 57° down to 40°, while maintaining a generous eye relief of 18mm to 16.3mm for comfortable viewing. Weighing just 133g and threaded for standard M28.5*0.6 filters, this eyepiece provides seamless magnification changes for any telescope with a 1.25\" focuser.\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\u003e7-21mm Linear Zoom: Find, Center, and Magnify in One Motion\u003c\/h3\u003e\n\u003cp\u003eThe core of the SV135 is its linear zoom mechanism, which allows you to change magnification smoothly without swapping eyepieces. You can start at the 21mm setting for a wide, low-power view to easily locate and center a target like the Orion Nebula (M42). As you twist the barrel, you can seamlessly increase power up to the 7mm setting to resolve fine details, such as the individual stars of the Trapezium, all without ever taking your eye from the focuser.\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\u003eFully Multi-Coated Optics: A 57° to 40° Variable Field\u003c\/h3\u003e\n\u003cp\u003eThe SV135's 6-element optical system features fully multi-coated (FMC) surfaces to maximize light transmission and contrast. At its widest 21mm setting, the eyepiece presents a 57° apparent field of view, ideal for framing large star clusters. As you zoom to the 7mm setting for higher power, the field of view narrows to 40°—a necessary trade-off in zoom eyepiece design that provides the power needed for resolving planetary details or splitting tight double stars.\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\u003eComfortable Viewing: 18mm Eye Relief and a 1.25\" Barrel\u003c\/h3\u003e\n\u003cp\u003eDesigned for accessibility, the SV135 maintains a long eye relief ranging from 18mm at 21mm to 16.3mm at 7mm. This consistency makes it an excellent choice for observers who wear glasses, eliminating the need to remove them to see the full field. The standard 1.25\" barrel ensures compatibility with virtually any telescope, and its lightweight 133g metal body won't create significant balance issues on smaller mounts.\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\u003eSV135 Zoom vs. Fixed Plössls: Convenience vs. Field of View\u003c\/h3\u003e\n\u003cp\u003eWhile a set of fixed focal length Plössl eyepieces will offer a consistently wider field of view (typically 50-52°), they cannot match the operational simplicity of the SV135 zoom. The ability to fine-tune magnification to perfectly frame an object or adapt to changing atmospheric seeing conditions is a significant advantage.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed Eyepiece Advantage:\u003c\/strong\u003e Generally provides a wider, flatter field and potentially higher light transmission due to a simpler optical design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSV135 Zoom Advantage:\u003c\/strong\u003e Unmatched convenience by eliminating eyepiece changes, making it ideal for outreach, travel scopes, or observers who prioritize a fluid viewing experience over a maximized field at high power.\u003c\/li\u003e\n\u003c\/ul\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 does the SVBONY SV135's field of view change as I zoom?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe apparent field of view on the SV135 is variable. It is at its widest, \u003cstrong\u003e57 degrees\u003c\/strong\u003e, at the 21mm focal length setting. As you increase magnification by zooming towards the \u003cstrong\u003e7mm\u003c\/strong\u003e setting, the field of view narrows to \u003cstrong\u003e40 degrees\u003c\/strong\u003e. This is a normal characteristic of zoom eyepiece designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 18mm eye relief on the SV135 suitable for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The eye relief ranges from \u003cstrong\u003e18mm to 16.3mm\u003c\/strong\u003e, which is considered long and provides ample distance for most eyeglass wearers to see the entire field of view comfortably without having to press their glasses against the lens.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use standard 1.25\" filters with the SVBONY SV135 zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The barrel of the SV135 eyepiece is threaded with the standard \u003cstrong\u003eM28.5*0.6\u003c\/strong\u003e thread pitch, making it compatible with all standard 1.25\" astronomy filters, such as moon filters, light pollution filters, or colored planetary filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the SVBONY SV135 to observe Jupiter with an 8\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV135 is perfect for this. You would start at the \u003cstrong\u003e21mm\u003c\/strong\u003e setting to easily find and center Jupiter in the wide 57° field. Once centered, you can smoothly zoom in towards the \u003cstrong\u003e7mm\u003c\/strong\u003e setting to increase magnification, allowing you to resolve details like the Great Red Spot and the main equatorial cloud bands without losing the planet from the field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SV135 a good choice for viewing the Moon in a small 70mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice for a \"grab-and-go\" lunar setup. At \u003cstrong\u003e21mm\u003c\/strong\u003e, you can frame the entire full Moon within the field of view. You can then zoom in to any focal length down to \u003cstrong\u003e7mm\u003c\/strong\u003e to get dramatic close-up views of specific features like the Apennine Mountains or the crater Copernicus, all with a simple twist of the eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the SV135 zoom over a set of individual eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is \u003cstrong\u003econvenience\u003c\/strong\u003e. Instead of carrying and switching between three or four separate eyepieces, the SV135 gives you every magnification between its 7mm and 21mm range in a single, 133g accessory. This allows for uninterrupted observing and the ability to perfectly match the magnification to your target and the current sky conditions.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e7mm - 21mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e57° - 40°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e18mm - 16.3mm\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 Design\u003c\/td\u003e\n\u003ctd\u003e6 elements in 4 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZoom Type\u003c\/td\u003e\n\u003ctd\u003eLinear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRubber Eye Guard\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterpupillary Distance\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eMetal + Optical Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e93mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e133g \/ 4.67oz\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\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 Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861231661341,"sku":"SV-W9105D","price":77.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-1-25inch-7mm-to-21mm-57-40-Zoom-Eyepiece-SVBONY-SV135-1-W9105D_6e076bb4-f50c-4a14-a8c1-2d9760f22f93.jpg?v=1788883298"},{"product_id":"svbony-sv152-20mm-70-swa-illuminated-crosshair-eyepiece-125in","title":"SVBONY SV152 20mm 70° SWA Illuminated Crosshair Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e20mm Focal Length\u003c\/li\u003e\n\u003cli\u003e70° Super Wide Apparent Field of View\u003c\/li\u003e\n\u003cli\u003eAdjustable LED-Illuminated Single Crosshair\u003c\/li\u003e\n\u003cli\u003e16mm Eye Relief\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel with M28.5*0.6 Filter Threads\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 SV152 20mm SWA 70° Illuminated Crosshair Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV152 20mm SWA 70° Illuminated Crosshair Eyepiece transforms object centering from guesswork into a repeatable, precise operation. Its 5-element, 4-group optical design provides a generous 70-degree apparent field of view, making it easy to locate guide stars or GoTo alignment targets. With 16mm of eye relief and a bright, adjustable LED-illuminated single crosshair, this eyepiece is an essential tool for manual guiding, drift alignment, and accurate initial setup, all housed in a durable metal body weighing just 221g.\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\u003e70° Field of View: A Wide Window for Precision Centering\u003c\/h3\u003e\n\u003cp\u003eA narrow field of view makes finding and centering alignment stars a frustrating task. The SV152's 70-degree Super Wide Angle (SWA) design provides an expansive backdrop, so your target star is easier to locate and bring to the center of the 25mm field stop. The 20mm focal length offers a versatile medium power, ideal for the initial alignment stages of a GoTo system or for finding a suitable guide star for manual off-axis guiding.\u003c\/p\u003e\n\u003cp\u003eThe 5-element optical system is fully multi-coated (FMC) to maximize light transmission. This ensures that even faint stars near the edge of your guide scope's field are visible against the illuminated reticle, a critical factor when working in light-polluted skies or targeting dim objects.\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\u003eAdjustable LED Illumination Across a 25mm Field Stop\u003c\/h3\u003e\n\u003cp\u003eThe core of the SV152 is its single crosshair reticle, illuminated by an adjustable LED. The ability to fine-tune the brightness is not a luxury—it's essential for accuracy. A reticle that is too bright will overwhelm a faint guide star, making it impossible to see, while one that is too dim is useless. The variable control lets you set the crosshair's brightness just above the background skyglow for perfect visibility without compromising your dark adaptation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e The eyepiece is housed in a metal body, ensuring the optics remain aligned and the illuminator withstands regular use in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Power:\u003c\/strong\u003e The illuminator is powered by two common 1.5V batteries, making replacements easy to find.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Ready:\u003c\/strong\u003e The 1.25\" barrel is threaded for M28.5*0.6 filters, allowing you to use a moon filter to reduce glare when centering on bright alignment stars.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSVBONY SV152 vs. a Standard Eyepiece: A Tool for Accuracy\u003c\/h3\u003e\n\u003cp\u003eA standard viewing eyepiece can only give you a subjective sense of \"center.\" For critical applications like polar alignment or centering a target for a small-sensor planetary camera, \"close enough\" isn't good enough. The SV152 provides a fixed, objective reference point that removes all ambiguity.\u003c\/p\u003e\n\u003cp\u003eWhile a standard Plössl eyepiece may be slightly lighter, it lacks the fundamental capability to measure drift or confirm centering. With the SV152's illuminated crosshair, you can precisely place an alignment star in the exact center of the field as required by your GoTo system, or carefully track the drift of a star for a highly accurate polar alignment. It is a diagnostic and alignment tool, not just a viewing accessory.\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\"\u003eWhat is the SVBONY SV152 20mm eyepiece primarily used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV152 is a specialized eyepiece designed for tasks requiring precise centering of celestial objects. Its primary uses include \u003cstrong\u003eGoTo mount alignment\u003c\/strong\u003e, \u003cstrong\u003emanual guiding\u003c\/strong\u003e for astrophotography, and performing \u003cstrong\u003edrift alignment\u003c\/strong\u003e for accurate polar alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the illuminator on the SV152 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adjustable LED illuminator is powered by \u003cstrong\u003etwo 1.5V batteries\u003c\/strong\u003e. The brightness can be adjusted via a small dial on the illuminator unit, allowing you to match the crosshair's intensity to the brightness of your target star.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 16mm eye relief on the SVBONY SV152 sufficient for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith \u003cstrong\u003e16mm of eye relief\u003c\/strong\u003e, most eyeglass wearers should be able to see a significant portion, if not all, of the 70-degree field of view. While not as long as some dedicated long-eye-relief designs, it is generally comfortable for the short, precise observations this eyepiece is designed for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the SVBONY SV152 20mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 1.25\" barrel is threaded with a standard \u003cstrong\u003eM28.5*0.6 thread\u003c\/strong\u003e, making it compatible with all standard 1.25\" astronomy filters. This is useful for adding a moon filter to reduce the glare of bright alignment stars like Sirius or Vega.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SVBONY SV152 help with polar aligning my 8-inch SCT using the drift alignment method?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor drift alignment with an 8-inch SCT, the SV152's illuminated crosshair is essential. After orienting the crosshairs north-south and east-west, you can watch a star drift relative to the fixed lines. The crosshair allows you to accurately judge the direction and speed of the drift, enabling you to make precise adjustments to your mount's altitude and azimuth for a near-perfect polar alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen setting up my GoTo mount, how does the SV152 make centering a bright star like Vega (Alpha Lyrae) more accurate than a standard eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen your GoTo handset instructs you to \"center Vega,\" a standard eyepiece forces you to guess the exact center of the field. With the SVBONY SV152, you simply move the mount until Vega is perfectly bisected by the illuminated crosshairs. This removes subjective error and provides your mount's alignment model with a much more accurate position, resulting in more precise GoTo slews all night.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e70-Degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Port\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003e5 elements in 4 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReticle\u003c\/td\u003e\n\u003ctd\u003eSingle Crosshair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIlluminator\u003c\/td\u003e\n\u003ctd\u003eAdjustable Brightness LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Source\u003c\/td\u003e\n\u003ctd\u003e2 x 1.5V Batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecup\u003c\/td\u003e\n\u003ctd\u003eRubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eMetal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e221g \/ 7.8oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e75*53*102mmmm\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\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":52861231923485,"sku":"SV-W9115A","price":90.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV152-20mm-SWA-70-Illuminated-Crosshair-Eyepiece-1-25-inch-1_b5f3175b-a7e3-48d5-913d-3dcdea361090.jpg?v=1788883362"},{"product_id":"svbony-sv154-15mm-70-swa-telescope-eyepiece-125in","title":"SVBONY SV154 15mm 70° SWA Telescope Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e15mm Focal Length\u003c\/li\u003e\n\u003cli\u003e70° Super-Wide Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25-inch Barrel Diameter\u003c\/li\u003e\n\u003cli\u003e13mm Eye Relief\u003c\/li\u003e\n\u003cli\u003e5-Element \/ 4-Group Optical Design\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 SV154 15mm SWA Eyepiece - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV154 15mm SWA eyepiece delivers a 70° apparent field of view in a standard 1.25-inch barrel, offering a significant upgrade in immersion over classic eyepiece designs. Its 5-element, 4-group optical design features a 18.8mm field stop to maximize the view, while providing 13mm of eye relief for comfortable observing sessions.\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\u003eA 70° Super-Wide-Angle View in a 1.25\" Barrel\u003c\/h3\u003e\n\u003cp\u003eThe 70° apparent field provides a wide, immersive window that keeps celestial objects framed with their surrounding star fields. The 5-element in 4-group optical system is fully multi-coated for high light transmission, and all lens edges are blackened to reduce internal reflections and improve contrast, making background skies appear darker and details on planets and nebulae more distinct.\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\u003e13mm Eye Relief and Twist-Up Eyecup for Viewing Comfort\u003c\/h3\u003e\n\u003cp\u003eWith 13mm of eye relief, the SV154 allows many observers to see the full field of view comfortably. While this distance may be tight for some eyeglass wearers, the integrated twist-up eyecup helps non-eyeglass users position their eye at the correct distance and blocks stray light for a higher-contrast view.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Filter Threads:\u003c\/strong\u003e The 1.25\" barrel is threaded for standard M28.5 x 0.6 filters, allowing you to easily add a moon filter or light pollution filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Recess:\u003c\/strong\u003e A machined recess on the barrel helps prevent the eyepiece from accidentally slipping out of the focuser if a thumbscrew loosens.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSV154 15mm vs. a Standard 15mm Plössl: Field of View and Immersion\u003c\/h3\u003e\n\u003cp\u003eCompared to a standard 15mm Plössl eyepiece, which typically offers a 50-52° apparent field, the SV154's 70° field is noticeably wider. This expanded view is a significant advantage when observing large open clusters like the Pleiades (M45) or scanning the rich star fields of the Milky Way, as you can fit more of the object and its context into a single view without needing to move the telescope.\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\"\u003eWhat is the main advantage of the SVBONY SV154 15mm over a standard Plössl?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is the \u003cstrong\u003e70° apparent field of view\u003c\/strong\u003e, which is significantly wider than the approximate 52° field of a Plössl. This creates a more immersive, \"spacewalk\" viewing experience and allows you to see a larger patch of sky at the same magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 13mm eye relief on the SV154 15mm SWA sufficient for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 13mm eye relief is borderline for many eyeglass wearers. While some users with glasses may find it acceptable, others might not be able to see the entire 70° field of view. Observers who do not wear glasses will find it comfortable, especially with the adjustable twist-up eyecup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SVBONY SV154 15mm perform on open clusters like the Pleiades (M45) in an 8\" f\/10 Schmidt-Cassegrain telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a typical 8\" SCT with a 2000mm focal length, the SV154 15mm eyepiece yields 133x magnification. The 70° field of view is ideal for framing large objects like the Pleiades (M45) or the Beehive Cluster (M44), showing the main stars and their surrounding nebulosity within a single, well-defined frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use standard 1.25\" filters with the SV154 15mm eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The barrel of the SVBONY SV154 is threaded with the standard \u003cstrong\u003eM28.5 x 0.6 thread pitch\u003c\/strong\u003e, making it compatible with all standard 1.25\" astronomical filters, such as moon filters, color filters, and light pollution reduction filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of views can I expect from the SV154 15mm on the Moon with an 80mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a short-tube 80mm refractor (e.g., f\/6, 480mm focal length), this eyepiece provides 32x magnification. This is an excellent low-power magnification for viewing the entire lunar disc at once, with plenty of dark sky around it to frame the view, making it perfect for public outreach or enjoying a full-disc perspective of the Moon's phases.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 5-element\/4-group design of the SVBONY SV154 15mm eyepiece mean for image quality?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis more complex optical design, compared to a 4-element Plössl, is necessary to achieve the wide 70° field of view while controlling for optical aberrations like distortion and chromatic aberration. The use of \u003cstrong\u003efully multi-coated\u003c\/strong\u003e surfaces and \u003cstrong\u003eblackened lens edges\u003c\/strong\u003e ensures the image remains bright and high-contrast.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e70°\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\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e13mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e18.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Structure\u003c\/td\u003e\n\u003ctd\u003e5 Elements in 4 Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eStandard 1.25\" (M28.5 x 0.6)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlackened Lens Edges\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Safety Recess\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecups\u003c\/td\u003e\n\u003ctd\u003eTwist-Up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecups Material\u003c\/td\u003e\n\u003ctd\u003eGlass \u0026amp; Metal\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY Warranty Policy\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861231956253,"sku":"SV-W9117A","price":58.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV154-Telescope-Eyepiece-1-25inch-70-Degree-SWA-15mm-Red-1_d72e0537-6739-449d-89d0-05c860310b5d.jpg?v=1788659786"},{"product_id":"svbony-sv154-26mm-70-swa-super-wide-angle-eyepiece-2in","title":"SVBONY SV154 26mm 70° SWA Super Wide Angle Eyepiece - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e26mm Focal Length\u003c\/li\u003e\n\u003cli\u003e70° Super Wide Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e20mm Eye Relief\u003c\/li\u003e\n\u003cli\u003eFits 2-inch Telescope Focusers\u003c\/li\u003e\n\u003cli\u003e5-Element \/ 3-Group Optical Design\u003c\/li\u003e\n\u003cli\u003eAccepts Standard 2\" (M48*0.75) Filters\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 SV154 2\" 26mm SWA 70° Super Wide Angle Telescope Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV154 26mm SWA eyepiece delivers an immersive 70° apparent field of view, providing expansive low-power vistas in any telescope equipped with a 2-inch focuser. Its 5-element, 3-group optical design is fully multi-coated for high contrast, and the generous 20mm of eye relief ensures comfortable viewing for all observers, including those who wear glasses. A large 32.3mm field stop maximizes the illuminated area, while the standard M48*0.75 threads accept all 2\" astronomy filters for enhanced deep-sky observation.\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\u003eThe SV154's 70° Field: Expansive Views in a 2-inch Barrel\u003c\/h3\u003e\n\u003cp\u003eThe core of the SV154's design is its 70° Super Wide Angle (SWA) apparent field, which creates a \"picture window\" effect on the night sky. This wider perspective allows you to frame large deep-sky objects like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000) in their entirety. The 5-element, 3-group lens system is fully multi-coated, increasing light transmission and reducing internal reflections for a bright, sharp image across the field.\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\u003eComfortable Viewing: 20mm Eye Relief and 305g Body\u003c\/h3\u003e\n\u003cp\u003eLong observing sessions are made easier by the SV154's thoughtful ergonomics. The 20mm of eye relief allows eyeglass wearers to see the entire 70° field without having to press their glasses against the lens. A soft, fold-down rubber eyecup helps to block stray light and position your eye correctly. At a net weight of 305g, this eyepiece is substantial enough to feel well-built without creating significant balance issues on most telescopes.\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\u003eSV154 26mm SWA vs. a Standard Plössl: A Wider Perspective\u003c\/h3\u003e\n\u003cp\u003eCompared to a standard 2-inch Plössl eyepiece, which typically offers a field of view around 52°, the SV154's 70° field is noticeably more expansive. This wider canvas provides a more immersive viewing experience and makes locating objects easier, serving as an excellent low-power \"finder\" eyepiece. While a Plössl is a classic design, the SV154's 5-element SWA configuration is specifically engineered to deliver that wider, more engaging perspective on the universe.\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\"\u003eWhat is the main advantage of the Svbony SV154's 70° field of view?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage of the \u003cstrong\u003e70° apparent field of view\u003c\/strong\u003e is the ability to see a much larger patch of sky at the same magnification compared to standard eyepieces. This makes it ideal for observing large star clusters, nebulae, and for simply sweeping the Milky Way. It provides a more immersive \"spacewalk\" feeling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 20mm eye relief on the SV154 26mm eyepiece suitable for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003e20mm eye relief\u003c\/strong\u003e is considered long and is very comfortable for most eyeglass wearers. It allows you to position your eye at a sufficient distance to see the entire 70° field of view without removing your glasses, which is critical for observers with astigmatism.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Svbony SV154 perform for viewing the Andromeda Galaxy (M31) in an 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 (2032mm focal length), the SV154 26mm eyepiece will provide 78x magnification and a true field of view of nearly a full degree. This is an excellent combination for framing the bright core and inner dust lanes of the Andromeda Galaxy (M31), making it a great choice for this specific target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use standard 2\" filters with the Svbony SV154 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The barrel of the Svbony SV154 is threaded for standard \u003cstrong\u003e2\" filters (M48*0.75)\u003c\/strong\u003e. This allows you to easily attach nebula filters (like UHC or O-III) or light pollution filters to enhance your views of deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat views can I expect from the SV154 26mm in a 6\" f\/5 Newtonian for observing the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a 6\" f\/5 Newtonian (750mm focal length), the SV154 26mm will yield a low magnification of 29x and a very wide true field of view of about 2.4 degrees. This setup is perfect for framing the entire Orion Nebula (M42) complex, from the Trapezium cluster to the fainter outer loops, all within a single, expansive field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 5-element design of the Svbony SV154 benefit the view?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e5-element, 3-group\u003c\/strong\u003e design allows for better correction of optical aberrations across a wide 70° field than a simpler 4-element Plössl could achieve. This more complex design is necessary to maintain sharp star images toward the edge of the field, providing a more satisfying wide-angle view.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e26mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e70°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e32.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003e5-Elements \/ 3-Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003e2\" Standard (M48*0.75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecups\u003c\/td\u003e\n\u003ctd\u003eFold-down Rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e305g \/ 10.7oz \/ 0.67lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\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\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":52861231989021,"sku":"SV-W9117B","price":70.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV154-2-26mm-SWA-70-Super-Wide-Angle-Telescope-Eyepiece-1_e565c30b-3d45-4717-8f8a-6f3d463c4128.jpg?v=1788659797"},{"product_id":"svbony-sv190-10mm-uf-ultra-flat-field-fmc-eyepiece-125in","title":"SVBONY SV190 10mm UF Ultra Flat Field FMC Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e10mm Focal Length\u003c\/li\u003e\n\u003cli\u003e60° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003eUltra-Flat Field Optical Design\u003c\/li\u003e\n\u003cli\u003e16mm Eye Relief\u003c\/li\u003e\n\u003cli\u003e1.25-inch Barrel with Filter Threads\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\u003eDownloads\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 SV190 UF Ultra Flat Field Eyepiece FMC 10mm 1.25inch\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV190 UF 10mm eyepiece corrects for field curvature across its entire 60° apparent field of view, using a 5-element, 4-group optical design to keep stars sharp from edge to edge. With a comfortable 16mm of eye relief, this eyepiece provides high-contrast, immersive views without requiring you to constantly refocus on objects drifting out of the center.\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\u003eA 60° Flat Field: 5-Element Optical Correction\u003c\/h3\u003e\n\u003cp\u003eUnlike simpler eyepiece designs that suffer from astigmatism and field curvature, the SV190 employs a 5-element, 4-group lens structure specifically to deliver a flat field. This means stars at the edge of the 60° apparent field of view remain as pinpoints, not streaks or blobs. Fully multi-coated optics ensure maximum light transmission, which is critical for resolving faint stars in globular clusters or fine details along the lunar terminator.\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\u003e16mm Eye Relief for Comfortable Viewing\u003c\/h3\u003e\n\u003cp\u003eThe SV190 offers a generous 16mm of eye relief, a significant advantage for a 10mm eyepiece that makes viewing comfortable, especially for eyeglass wearers. This long eye relief allows you to see the entire 60° field without pressing your eye against the lens, reducing fatigue during long observing sessions. A soft rubber eyecup helps to block stray light and properly position your eye.\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\u003eSVBONY SV190 10mm vs. a Standard 10mm Plössl\u003c\/h3\u003e\n\u003cp\u003eA standard 10mm Plössl is a workhorse eyepiece, but its limitations become apparent when observing wide fields. The SV190 UF offers two distinct advantages over a typical Plössl design.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge-to-Edge Sharpness:\u003c\/strong\u003e A Plössl's field is only truly sharp in the central 60-70%. The SV190's flat-field design corrects for this, making the entire view usable and sharp, which is ideal for tracking planets as they drift or studying the structure of open clusters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider Apparent Field:\u003c\/strong\u003e With a 60° apparent field of view compared to a Plössl's typical 52°, the SV190 provides a more immersive, \"spacewalk\" feeling. This wider context makes it easier to frame larger targets and navigate star fields.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhat makes the SVBONY SV190 10mm an \"Ultra Flat\" eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \"Ultra Flat\" designation refers to its advanced \u003cstrong\u003e5-element, 4-group\u003c\/strong\u003e optical design, which corrects for field curvature. This ensures that stars and other objects remain in sharp focus across the entire \u003cstrong\u003e60° field of view\u003c\/strong\u003e, not just in the center, which is a common issue with simpler eyepiece designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SVBONY SV190 10mm perform on the Orion Nebula (M42) in an f\/5 reflector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn an f\/5 reflector, the SVBONY SV190 10mm will excel. Its flat-field correction is most noticeable in fast telescopes like yours, where edge-of-field aberrations are more pronounced. You will be able to resolve the stars of the Trapezium cluster at the core of M42 as sharp points, even as they drift toward the edge of the eyepiece's 60° field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 16mm eye relief on the SVBONY SV190 10mm enough for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the \u003cstrong\u003e16mm eye relief\u003c\/strong\u003e is considered very comfortable and is generally sufficient for most eyeglass wearers to see the full field of view. You can observe with your glasses on without losing sight of the edges of the frame, which is a significant ergonomic benefit over eyepieces with shorter eye relief.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the SVBONY SV190 10mm's 60° field of view compared to a standard Plössl?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV190 10mm provides a noticeably wider and more immersive view than a standard 50°-52° Plössl. This wider window makes it easier to frame celestial objects and delivers a more engaging \"spacewalk\" experience. Combined with its flat-field characteristics, the entire 60° view is sharp and usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the M28.5*0.6 threads on the SVBONY SV190 10mm barrel do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eM28.5*0.6 threads\u003c\/strong\u003e at the base of the 1.25\" barrel are standard filter threads. They allow you to attach any 1.25\" astronomy filter, such as a moon filter for reducing glare, a light pollution filter, or a color filter for enhancing planetary details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV190 10mm a good eyepiece for viewing Jupiter in an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. In a typical 8\" f\/10 SCT (2000mm focal length), a 10mm eyepiece yields 200x magnification, which is an excellent power for viewing details like Jupiter's cloud bands and the Great Red Spot. The flat-field design of the SVBONY SV190 10mm ensures that Jupiter and its moons remain sharp as they transit the field of view.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e60°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e16mm\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\u003eLens Structure\u003c\/td\u003e\n\u003ctd\u003e5-Elements \/ 4-Groups\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\u003eField Diaphragm\u003c\/td\u003e\n\u003ctd\u003e14.7mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecup Accessory Threads\u003c\/td\u003e\n\u003ctd\u003eM34*0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecup Type\u003c\/td\u003e\n\u003ctd\u003eRubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e84g \/ 2.95oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Dimensions\u003c\/td\u003e\n\u003ctd\u003e110x76x70mm\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\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":52861232021789,"sku":"SV-W9149A","price":60.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV190-UF-Ultra-Flat-Field-Eyepiece-FMC-10mm-1-25inch-1_77c60133-5de3-464a-b3b2-5acf9f33e9ed.jpg?v=1788659806"},{"product_id":"svbony-sv190-18mm-uf-ultra-flat-field-eyepiece-125in","title":"SVBONY SV190 18mm UF Ultra Flat Field Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e18mm Focal Length\u003c\/li\u003e\n\u003cli\u003e65° Ultra-Flat Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003e20mm Long Eye Relief\u003c\/li\u003e\n\u003cli\u003e8-Element \/ 5-Group Optical Design\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\u003eDownloads\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 SV190 1.25\" UF18mm Ultra Flat Field Eyepiece\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV190 UF18mm Eyepiece delivers a tack-sharp, flat 65-degree apparent field of view using a complex 8-element, 5-group optical formula. Its 18mm focal length provides versatile medium magnification ideal for deep-sky objects, while the generous 20mm of eye relief ensures comfortable viewing for all observers, including those who wear glasses. The 1.25-inch barrel is threaded for standard M28.5*0.6 filters, and its 23.4mm field diaphragm maximizes the corrected image area without vignetting.\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\u003eAn 8-Element, 5-Group Design for a Truly Flat 65° Field\u003c\/h3\u003e\n\u003cp\u003eUnlike simpler eyepiece designs that suffer from field curvature and astigmatism near the edges, the SV190 employs an 8-element, 5-group construction specifically to correct these aberrations. This means stars remain tight, round points from the center of the 65-degree field right to the edge stop. While more complex than a standard Plössl, this design is the key to its edge-to-edge sharpness, a critical factor for observers using fast telescopes prone to coma.\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\u003e20mm Eye Relief for Comfortable Viewing With or Without Glasses\u003c\/h3\u003e\n\u003cp\u003eWith a generous 20mm of eye relief, the SV190 allows you to position your eye at a comfortable distance from the lens and still see the entire field of view. This is a crucial feature for eyeglass wearers, who often cannot get close enough to eyepieces with short eye relief. The adjustable rubber eyecup also helps to block stray light and properly position your eye, enhancing contrast and comfort during long observing sessions.\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\u003eStandard 1.25\" Barrel with M42 T-Threads\u003c\/h3\u003e\n\u003cp\u003eThe SV190 fits any standard 1.25\" focuser or diagonal and features M28.5*0.6 threads for all your 1.25\" filters. A unique addition is the M42*0.75 T-thread concealed beneath the rubber eyecup. This allows for the direct, secure attachment of camera T-rings and other accessories, making the SV190 a capable eyepiece for afocal astrophotography projects where a rigid connection is essential.\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\"\u003eWhat makes the SVBONY SV190 18mm an 'Ultra Flat Field' eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV190 uses a complex \u003cstrong\u003e8-element, 5-group\u003c\/strong\u003e optical design. This corrects for field curvature, ensuring that stars remain sharp and point-like across the entire \u003cstrong\u003e65-degree field of view\u003c\/strong\u003e, unlike simpler designs which can show distortion at the edges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SV190 18mm perform on open clusters like the Pleiades (M45) in an 8-inch f\/5 Newtonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt's an excellent choice. The 18mm focal length provides a medium-power, wide view perfect for framing large clusters like M45. More importantly, its flat-field design will minimize coma and astigmatism at the edge of the field, which are common issues in fast f\/5 Newtonians, keeping all the stars in the cluster sharp.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 20mm eye relief on the SV190 eyepiece really enough for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, \u003cstrong\u003e20mm of eye relief\u003c\/strong\u003e is considered very generous and is ideal for observers who wear glasses. You will be able to see the entire 65-degree field of view comfortably without having to press your glasses against the lens. It also includes a rubber eyecup for non-eyeglass wearers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SV190 18mm a good choice for planetary viewing of Jupiter or Saturn in a 102mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile its primary strength is wide, flat-field viewing of deep-sky objects, the 18mm focal length provides a useful medium magnification for planets. In a typical 102mm refractor (e.g., f\/7), it will yield around 40x magnification, which is great for locating the planet and seeing its moons. For detailed views of cloud bands on Jupiter, you would typically use a shorter focal length eyepiece for higher power.\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 M42*0.75 thread under the eyecup of the SV190 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is a standard \u003cstrong\u003eT-thread (M42x0.75)\u003c\/strong\u003e. It allows you to securely attach accessories like a DSLR camera (with the appropriate T-ring) for afocal photography, where you take a picture through the eyepiece. It provides a much more stable connection than universal smartphone adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 65° field of view of the SV190 18mm compare to a standard Plössl eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard 1.25\" Plössl eyepiece typically has an apparent field of view around 50-52 degrees. The \u003cstrong\u003e65-degree field\u003c\/strong\u003e of the SV190 provides a noticeably wider, more immersive window on the sky. This wider context is especially beneficial for observing large nebulae and star clusters.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e18mm\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\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e65°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e8 Elements in 5 Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e23.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory Threads\u003c\/td\u003e\n\u003ctd\u003eM42 x 0.75 (under eyecup)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecup Type\u003c\/td\u003e\n\u003ctd\u003eRubber\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\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":52861232120093,"sku":"SV-W9149B","price":94.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"svbony-sv191-7-2-21-6mm-zoom-eyepiece-125in","title":"SVBONY SV191 7.2-21.6mm Zoom Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e7.2mm to 21.6mm Zoom Focal Length\u003c\/li\u003e\n\u003cli\u003e42° to 65° Apparent Field of View\u003c\/li\u003e\n\u003cli\u003e18mm to 20mm Long Eye Relief\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" Barrel Diameter\u003c\/li\u003e\n\u003cli\u003eLightweight 167g Construction\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 SV191 7.2-21.6mm Zoom Eyepiece - 1.25\"\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV191 Zoom Telescope Eyepiece replaces a case full of eyepieces with a single, versatile unit, offering a continuous 7.2mm to 21.6mm focal length range in a standard 1.25\" barrel. Its 7-element, 4-group optical system delivers an apparent field of view that expands from 42° to a wide 65° as you zoom out. With a generous 18-20mm of eye relief and a net weight of only 167g, it provides comfortable, fatigue-free viewing sessions without creating balance issues on your telescope.\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\u003eA 3x Zoom Range: 7.2mm to 21.6mm in One Eyepiece\u003c\/h3\u003e\n\u003cp\u003eThe core of the SV191 is its ability to adjust magnification instantly. Start at the 21.6mm setting for a low-power, wide-field view to easily locate your target, then simply twist the barrel to zoom in to 7.2mm for high-power views of planetary details or tight double stars. This eliminates the need to swap eyepieces, saving time and reducing the chance of dropping accessories in the dark.\u003c\/p\u003e\n\u003cp\u003eThis all-in-one design is ideal for public outreach, introducing beginners to astronomy, or for \"grab-and-go\" setups where minimizing gear is a priority. The smooth zoom mechanism allows you to perfectly frame objects like the Moon or match the magnification to changing atmospheric seeing conditions without ever taking your eye from the telescope.\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\u003e42°-65° Field with 7-Element, Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eThe SV191's apparent field of view dynamically changes as you zoom, offering a wide 65° at the 21.6mm setting and a more focused 42° at 7.2mm. The 7-element, 4-group lens structure is fully multi-coated to maximize light transmission and contrast. Blackened lens edges further suppress internal reflections, ensuring the background sky remains dark and object details stand out.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-Coated Lenses:\u003c\/strong\u003e Increases brightness and contrast compared to single-coated or uncoated optics, which is critical for resolving faint details.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16mm Field Stop:\u003c\/strong\u003e Defines the sharp edge of the field at the lowest magnification, providing a clean boundary for your view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM28.5*0.6 Filter Threads:\u003c\/strong\u003e The standard 1.25\" filter thread allows you to easily add planetary, nebula, or moon filters to enhance your observations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e18-20mm Eye Relief and a 167g Lightweight Body\u003c\/h3\u003e\n\u003cp\u003eComfort is essential for extended observing, and the SV191 delivers with 18-20mm of long eye relief across its entire zoom range. This makes it an excellent choice for eyeglass wearers, who can see the entire field of view without having to press their glasses against the lens. A metal, twist-up eyecup allows non-eyeglass wearers to find the perfect eye position and helps block stray light.\u003c\/p\u003e\n\u003cp\u003eAt just 167g (5.87oz), the SV191 is exceptionally lightweight for a zoom eyepiece. This minimizes the need to rebalance your telescope when changing magnifications, a common issue when switching between small and large fixed-focal-length eyepieces. Its compact form factor makes it an easy addition to any accessory case.\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\u003eSV191 Zoom vs. Fixed Plössls: Convenience vs. Field of View\u003c\/h3\u003e\n\u003cp\u003eWhile a set of individual Plössl eyepieces might offer slightly sharper edge performance, the SV191 provides a level of convenience that is unmatched. The primary trade-off is often in the field of view at lower powers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed Eyepieces Advantage:\u003c\/strong\u003e A typical 20mm Plössl eyepiece has a 50°-52° AFOV. At its 21.6mm setting, the SV191 offers a wider 65° field, bucking the typical trend for zoom eyepieces. However, at the high-power end, the SV191's 42° field is narrower than the ~52° of a standalone 7mm Plössl.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSV191 Zoom Advantage:\u003c\/strong\u003e You get every magnification between 7.2mm and 21.6mm, allowing you to fine-tune your view perfectly. It's lighter, more compact, and more cost-effective than buying three or four separate eyepieces to cover the same range. For lunar, planetary, and solar observing, the ability to quickly adjust magnification is a significant practical benefit.\u003c\/li\u003e\n\u003c\/ul\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 does the SVBONY SV191 perform on the Moon with an 8\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV191 is an excellent lunar eyepiece for an 8\" f\/6 Dobsonian. At 21.6mm, you can frame the entire lunar disc. You can then zoom in smoothly to the 7.2mm setting for high-power views of specific craters like Copernicus or the rilles near Plato, all without changing eyepieces, which is a major convenience on a manually-tracked scope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SV191 to find and zoom in on the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. You would start at the 21.6mm setting, which provides the lowest magnification and widest field of view (65°) to easily locate and center the Orion Nebula (M42). Once centered, you can twist the eyepiece to increase magnification, allowing you to resolve the four stars of the Trapezium cluster at the nebula's core.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the SVBONY SV191 eyepiece need to be refocused after zooming?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV191 is largely par-focal, meaning it should hold focus reasonably well across its zoom range. However, slight changes in your telescope's focus or your own eye may require minor adjustments with the focuser knob after a large change in magnification for optimal sharpness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 18-20mm eye relief on the SV191 comfortable for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The \u003cstrong\u003e18-20mm eye relief\u003c\/strong\u003e is considered very long and is a key feature of this eyepiece. It allows users who wear glasses for astigmatism to see the entire apparent field of view comfortably without removing their spectacles. The twist-up eyecup also helps set the proper distance for those who do not wear glasses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use standard 1.25\" filters with the SV191 zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The barrel of the SVBONY SV191 is threaded for standard 1.25\" astronomical filters (\u003cstrong\u003eM28.5*0.6 thread standard\u003c\/strong\u003e). You can easily attach color filters for planetary viewing, a moon filter to reduce glare, or a light pollution filter for observing nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs a zoom eyepiece like the SV191 good for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's very practical for planets. Atmospheric \"seeing\" can change from moment to moment. A zoom eyepiece allows you to instantly dial back the magnification when the view gets blurry and push it higher during moments of steady air to catch fine detail on Jupiter or Saturn, without fumbling for different eyepieces in the dark.\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\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e7.2mm - 21.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e42° - 65°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e18mm - 20mm\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\u003eLens Structure\u003c\/td\u003e\n\u003ctd\u003e7-Elements \/ 4-Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Stop Diameter\u003c\/td\u003e\n\u003ctd\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6 (Standard 1.25\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlackened Lens Edges\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecup Type\u003c\/td\u003e\n\u003ctd\u003eTwist-Up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyecup Material\u003c\/td\u003e\n\u003ctd\u003eMetal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e167g \/ 5.87oz \/ 0.367lb\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\"\u003eSVBONY SV191 7.2-21.6mm Zoom Eyepiece\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\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY Warranty Policy\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861232152861,"sku":"SV-W9150A","price":94.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV191-Zoom-Telescope-Eyepiece-Super-Wide-Angle-Black-1-25inch-1_2e8768ee-ce59-4ea3-8570-274a874431af.jpg?v=1788659823"},{"product_id":"svbony-sv215-3-8mm-clickstop-zoom-eyepiece-125in","title":"SVBONY SV215 3-8mm Clickstop Zoom Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eVariable Focal Length Zoom Eyepiece\u003c\/li\u003e\n\u003cli\u003eTactile Clickstop Mechanism at Set Magnifications\u003c\/li\u003e\n\u003cli\u003eConstant Apparent Field of View Across Zoom Range\u003c\/li\u003e\n\u003cli\u003eMulti-Coated Optics for High Contrast\u003c\/li\u003e\n\u003cli\u003eOptimized for Planetary and Lunar Observation\u003c\/li\u003e\n\u003cli\u003eStandard 1.25\" Barrel Format\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 SV215 1.25\" 3-8mm Clickstop Zoom Eyepiece for Planet View\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV215 Clickstop Zoom Eyepiece consolidates the utility of multiple planetary eyepieces into a single, adaptable unit. Its smooth zoom mechanism allows for seamless magnification changes, letting you adjust your view to match atmospheric seeing conditions instantly. This eyepiece is engineered specifically for detailed solar system observation, with multi-coated optics designed to render sharp, high-contrast images of lunar features and planetary details.\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\u003eSVBONY SV215: A Constant Field for Seamless Planetary Zooming\u003c\/h3\u003e\n\u003cp\u003eUnlike many zoom eyepieces that exhibit a \"tunnel vision\" effect at one end of their range, the SV215 is designed to maintain a consistent apparent field of view as you change magnification. This parfocal-like characteristic means the view remains immersive and the object stays centered as you zoom in on features like Jupiter's Great Red Spot or the Cassini Division in Saturn's rings. You spend less time re-centering your target and more time observing critical details.\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\u003eSVBONY SV215: Tactile Feedback with a Clickstop Zoom Mechanism\u003c\/h3\u003e\n\u003cp\u003eThe SV215 incorporates a clickstop zoom mechanism that provides positive, tactile feedback at several precise focal lengths. This feature is invaluable in the dark, as it allows you to change magnification by feel without looking away from the target or using a flashlight. It also enables you to quickly return to a preferred magnification, making it easy to compare views or switch between finding a feature and examining it up close.\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\u003eSVBONY SV215: High-Contrast Optics for Solar System Targets\u003c\/h3\u003e\n\u003cp\u003eResolving subtle details on planets requires excellent image contrast. The SV215 eyepiece uses multi-coated optical surfaces to maximize light transmission and minimize internal reflections that can wash out faint features. This optical design helps reveal delicate cloud bands on Jupiter, subtle albedo markings on Mars, and the intricate rilles and crater chains on the Moon's surface, delivering views that are sharp and clear.\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 does the SVBONY SV215's clickstop feature help when observing Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe clickstop feature allows you to make precise, repeatable magnification changes by feel. When observing Jupiter, you can use a lower power setting to frame the planet with its four Galilean moons, then instantly \"click\" to a higher magnification to study the Great Red Spot or individual cloud bands, all without losing your place or needing a light.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV215 a good choice for tracking the Moon's terminator with a Dobsonian telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice. The ability to zoom allows you to start with a wider view to locate a specific crater or rille along the terminator, then increase magnification to study it in high detail as it passes through the field of view. The constant apparent field of view ensures the experience is consistent as you zoom.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of a zoom eyepiece like the SVBONY SV215 over several fixed eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is convenience and speed. The SVBONY SV215 replaces an entire set of planetary eyepieces, eliminating the need to constantly swap them out. This allows you to instantly find the ideal magnification for the current atmospheric \"seeing\" conditions, which can change from moment to moment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the constant field of view on the SVBONY SV215 improve the observing experience?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA constant apparent field of view means the perceived size of the viewing window does not shrink as you increase magnification. This avoids the \"tunnel vision\" effect common in some zoom designs, providing a more immersive and consistent view of your target across the entire zoom range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV215 eyepiece suitable for viewing deep-sky objects?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the SV215 is optimized for the high magnifications used in planetary and lunar viewing, it can also be used for splitting close double stars or observing small, bright planetary nebulae and globular clusters. However, for expansive deep-sky objects like large nebulae and galaxies, a fixed focal length eyepiece with a wider apparent field of view is typically preferred.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope works best with the SVBONY SV215 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV215 is well-suited for any telescope with a 1.25\" focuser, but it particularly shines in long-focal-ratio instruments like Schmidt-Cassegrains, Maksutov-Cassegrains, and refractors. These telescopes are often used for planetary viewing, and the SV215's focal length range provides the high magnifications needed to see fine detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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":52861232185629,"sku":"SV-W9166A","price":154.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV215-1-25-3-8mm-Clickstop-Zoom-Eyepiece-for-Planet-View-1_1b88559c-5161-409c-9b82-587cf6fe0d49.jpg?v=1788659835"},{"product_id":"svbony-sv230-8-20mm-super-zoom-aspheric-eyepiece-125in","title":"SVBONY SV230 8-20mm Super Zoom Aspheric Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e8mm to 20mm Continuous Zoom Focal Length\u003c\/li\u003e\n\u003cli\u003eParfocal Design Maintains Focus Across Zoom Range\u003c\/li\u003e\n\u003cli\u003eAspheric Optics for Edge-to-Edge Sharpness\u003c\/li\u003e\n\u003cli\u003eLong 17-19mm Eye Relief for Eyeglass Wearers\u003c\/li\u003e\n\u003cli\u003eIncludes Both 1.25\" and 2\" Barrels\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 SV230 Zoom Eyepiece Clickstop Parfocal 8-20mm\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV230 Zoom Eyepiece replaces a case of individual eyepieces with a single, parfocal 8-20mm optical system compatible with both 1.25\" and 2\" focusers. It maintains focus across its entire zoom range and provides a comfortable 17-19mm of eye relief, all in a substantial 500g body designed for serious observation.\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\u003eParfocal 8-20mm Zoom: One Eyepiece, Multiple Magnifications\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece's core feature is its continuous 8mm to 20mm zoom range. You can seamlessly transition from low-power wide fields to high-power planetary detail without ever swapping eyepieces. Because the SV230 is parfocal, there's no need to refocus after changing magnification, allowing you to track moving objects or adjust for changing seeing conditions instantly.\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\u003eSharp Fields from 8mm to 20mm: Aspheric Optical Design\u003c\/h3\u003e\n\u003cp\u003eSvbony integrated aspheric lens elements and an astigmatism corrector into the SV230's design to deliver sharp, high-contrast views across the entire field. This advanced optical formula minimizes the edge distortion and field curvature often seen in conventional zoom eyepieces. The result is a clear, immersive view where stars remain tight points from the center to the field stop, regardless of the selected focal length.\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\u003eBuilt for Comfort and Compatibility: 17-19mm Eye Relief and Dual Barrels\u003c\/h3\u003e\n\u003cp\u003eWith a generous 17-19mm of eye relief, the SV230 is comfortable for all observers, including those who wear glasses. The included adapter allows the eyepiece to be used in both 1.25\" and 2\" focusers, ensuring compatibility with virtually any telescope. While its 500g weight reflects a robust optical and mechanical construction, be sure to check your focuser's capacity and your telescope's balance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Fit Barrels:\u003c\/strong\u003e Use the native 1.25\" barrel for smaller telescopes or attach the included 2\" adapter for larger focusers, providing maximum flexibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Eye Relief:\u003c\/strong\u003e The 17-19mm eye relief allows you to see the full field of view comfortably with or without eyeglasses, reducing eye strain during long sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera Ready:\u003c\/strong\u003e The rubber eyecup can be removed to reveal a T-mount thread, allowing for direct connection of a DSLR or mirrorless camera for afocal astrophotography (requires a separate T-adapter).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 8-20mm SV230 Zoom vs. Fixed Eyepieces: Convenience and Parfocal Design\u003c\/h3\u003e\n\u003cp\u003eWhile a set of premium fixed-focal-length eyepieces might offer a wider apparent field of view at specific magnifications, they cannot match the operational simplicity of the SV230 zoom.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed Eyepiece Advantage:\u003c\/strong\u003e Individual eyepieces are often lighter and can be optimized for a single, wider apparent field of view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSV230 Zoom Advantage:\u003c\/strong\u003e The SV230 offers the power of four or five eyepieces in one. Its parfocal nature eliminates constant refocusing, making it ideal for outreach events, tracking objects like the International Space Station, or for observers who value efficiency and want to minimize handling gear in the dark.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eWhat does 'parfocal' mean for the Svbony SV230 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eParfocal\u003c\/strong\u003e means the eyepiece is engineered to maintain focus even when you change the magnification. Once you achieve a sharp image at 20mm, you can zoom all the way to 8mm, and the view will remain sharp with little to no adjustment needed. This is a significant convenience, especially when observing planets or the Moon.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Svbony SV230's 17-19mm eye relief enough for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003e17-19mm eye relief\u003c\/strong\u003e is considered long and is specifically designed to be comfortable for observers who need to wear glasses to correct for astigmatism. You will be able to see the entire field of view without having to press your glasses against the lens.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach a camera to the Svbony SV230 zoom eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV230 features a removable rubber eyecup. Once removed, it exposes a T-mount thread underneath. To attach a camera, you will need a T-ring specific to your camera's brand (e.g., Canon, Nikon, Sony) and potentially a T-mount adapter, which are sold separately. This allows for sturdy afocal projection imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 500g weight of the SV230 be an issue for my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e500g (1.1 lbs)\u003c\/strong\u003e weight is substantial due to the complex optics. For most telescopes with 2\" focusers, like Schmidt-Cassegrains or larger Dobsonians, this is not an issue. However, on smaller refractors or reflectors with 1.25\" plastic focusers, you may need to check the focuser's load capacity and rebalance the telescope tube to prevent slipping or strain.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the Svbony SV230 to observe Jupiter with my 8\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eStart at the 20mm setting (lowest power) to easily locate Jupiter in the wide field of view. Center the planet, then smoothly zoom in towards the 8mm setting. As you zoom, the image will get larger, revealing cloud bands and the Galilean moons. Because the SV230 is parfocal, you won't need to refocus, allowing you to find the perfect magnification that seeing conditions will support for the sharpest view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Svbony SV230 a good choice for viewing the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. At the 20mm setting, you can frame the entire nebula, including its faint outer extensions. You can then zoom in to the 12mm or 10mm range to resolve the four stars of the Trapezium cluster at its core. The ability to adjust magnification on the fly is perfect for exploring the intricate details of large deep-sky objects like the Orion Nebula (M42).\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e17-19mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e500g\/17.66oz\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\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 Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861232218397,"sku":"SV-W9185A","price":420.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV230-Zoom-Eyepiece-Clickstop-Parfocal-8-20mm-1-25-2-Adapter-1_e0b583e2-79bb-4468-aab2-a6f574ea644b.jpg?v=1788883725"},{"product_id":"svbony-sv245-zoom-eyepiece-125in","title":"SVBONY SV245 Zoom Eyepiece - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e8mm-16mm Zoom Focal Length\u003c\/li\u003e\n\u003cli\u003eParfocal Design Remains in Focus While Zooming\u003c\/li\u003e\n\u003cli\u003eClick-Stop Mechanism for Precise Focal Length Selection\u003c\/li\u003e\n\u003cli\u003eComfortable for Eyeglass Wearers\u003c\/li\u003e\n\u003cli\u003eIncludes 2\" Interface Adapter\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\u003eDownloads\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\u003eZoom Eyepiece SV245\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV245 Zoom Eyepiece covers a seamless 8mm to 16mm focal range in a single unit, designed to remain parfocal across all magnifications. Included with the eyepiece is a 2-inch interface, ensuring it fits a wide variety of telescopes.\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\u003e8mm-16mm Parfocal Zoom: Click-Stop Adjustments \u0026amp; No Refocusing\u003c\/h3\u003e\n\u003cp\u003eThis eyepiece replaces a case full of individual eyepieces by covering the critical medium-to-high power range from 8mm to 16mm. Its parfocal design means you can change magnification without needing to make major refocusing adjustments, which is critical for keeping a moving target like Jupiter or Saturn centered and sharp. The body features a click-stop mechanism with precise detents, allowing you to reliably select specific focal lengths in the dark.\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\u003eEyeglass-Friendly Design with a 2\" Interface\u003c\/h3\u003e\n\u003cp\u003eThe SV245 is built for comfort, with generous eye relief that allows observers to see the entire field of view with their glasses on. Its optics are multi-coated to improve contrast and light transmission for sharper, more vivid images. While the convenience of a zoom is unmatched, the typical trade-off is a slightly narrower apparent field of view compared to premium fixed-focal-length eyepieces. The eyepiece includes a 2\" interface adapter for use in larger focusers, adding to its compatibility with a wide range of instruments.\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\"\u003eWhat does \"parfocal\" mean for the SVBONY SV245 eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eParfocal\u003c\/strong\u003e means the eyepiece is designed to maintain focus even as you change its focal length. With the SVBONY SV245, you can zoom from 16mm to 8mm, and the image will remain sharp with little to no need to adjust your telescope's focuser. This is a significant convenience, especially for tracking celestial objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV245 zoom eyepiece comfortable to use with glasses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The SVBONY SV245 is designed with generous eye relief, ensuring that there is enough space between the eyepiece and your eye to comfortably see the entire field of view while wearing eyeglasses. It is also compatible with common astigmatism correctors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the click-stop feature on the SVBONY SV245?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe click-stop mechanism provides tactile feedback as you rotate the zoom collar, with distinct \"clicks\" at marked focal lengths. This allows you to know exactly what magnification you are using without looking and makes it easy to return to a specific setting, even in complete darkness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SVBONY SV245 perform on the Moon with a 90mm f\/10 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a 90mm f\/10 refractor (900mm focal length), the SVBONY SV245 would provide a magnification range from 56x (at 16mm) to 112.5x (at 8mm). This range is ideal for lunar observing, allowing you to frame the entire disk at 16mm and then zoom in to examine specific craters, rilles, and mountain ranges at 8mm without swapping eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV245 a good choice for splitting double stars like Albireo with an 8-inch Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice. An 8-inch (203mm) f\/6 Dobsonian has a focal length of about 1200mm. The SVBONY SV245 would yield magnifications from 75x to 150x. This range is perfect for resolving colorful double stars like Albireo (Beta Cygni), allowing you to easily frame the pair at low power and then zoom in to cleanly separate the gold and blue components.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat size focuser does the SVBONY SV245 fit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV245 eyepiece is versatile. While it has a native barrel size (typically 1.25\"), it comes with a \u003cstrong\u003e2\" interface adapter\u003c\/strong\u003e, allowing it to be used in both standard 1.25\" and larger 2\" telescope focusers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\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\"\u003eSVBONY SV245 Zoom Eyepiece 8mm-16mm\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Lens Interface\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 3\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEyepiece Soft Bag\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\u003cul class=\"DAV-grid\"\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":52861232251165,"sku":"SV-W9192A","price":224.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Zoom-Eyepiece-SV245-1_1245c71e-c1b7-4478-a85b-ef6d2d8e9d7b.jpg?v=1788659853"},{"product_id":"svbony-sv233-7-piece-telescope-accessory-kit","title":"SVBONY SV233 7-Piece Telescope Accessory Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e6mm \u0026amp; 17mm Plössl Eyepieces\u003c\/li\u003e\n\u003cli\u003e2x Barlow Lens (2-Element)\u003c\/li\u003e\n\u003cli\u003eMoon, ND, and #82A Color Filters\u003c\/li\u003e\n\u003cli\u003e1.25\" Barrel Size\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated Optics\u003c\/li\u003e\n\u003cli\u003eM28.5x0.6mm Filter Threads\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\u003eDownloads\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 SV233 7 Piece Telescope Accessory Kit\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV233 7 Piece Telescope Accessory Kit expands your observing capabilities with two 1.25\" Plössl eyepieces at 6mm and 17mm focal lengths, each offering a 48° apparent field of view. This kit effectively quadruples your magnification options by including a 2-element, 2x Barlow lens with M42x0.75 threads. A set of three filters—a Moon filter, an ND filter, and a #82A color filter—thread directly onto the eyepieces with a standard M28.5x0.6mm thread to enhance contrast on specific celestial targets.\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\u003eTwo 1.25\" Plössl Eyepieces: 6mm and 17mm Focal Lengths\u003c\/h3\u003e\n\u003cp\u003eThis kit is built around two versatile 1.25\" Plössl eyepieces, providing both high-power and medium-power views right out of the box. Both eyepieces feature fully multi-coated optics and blackened lens edges to maximize contrast and light transmission within their 48° apparent field of view. The 17mm eyepiece offers a comfortable 12.5mm of eye relief for general-purpose viewing, while the 6mm eyepiece pushes magnification for detailed views of planetary surfaces, though its 3.5mm eye relief is tight and requires close eye placement.\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\u003eThe 2x, 2-Element Barlow Lens\u003c\/h3\u003e\n\u003cp\u003eIncluded in the SV233 kit is a 2-element Barlow lens that doubles the magnification of any 1.25\" eyepiece. This accessory instantly transforms your two eyepieces into four magnification options, converting the 17mm into an 8.5mm and the 6mm into a high-power 3mm. The Barlow features M42x0.75 T-threads, allowing you to attach a DSLR or dedicated astronomy camera for basic afocal imaging, adding another layer of utility to the kit.\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\u003eA 3-Filter Set for Lunar and Planetary Viewing\u003c\/h3\u003e\n\u003cp\u003eTo improve views of bright objects, the kit includes three essential 1.25\" filters that attach via M28.5x0.6mm threads. The Moon filter reduces glare without altering color, increasing contrast on lunar maria and crater walls. The ND (Neutral Density) filter provides a more significant brightness reduction, useful for observing Venus or splitting bright double stars. Finally, the #82A light blue filter enhances low-contrast features on Jupiter and Mars, helping to define cloud bands and surface details.\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\"\u003eWhat objects is the Svbony SV233 accessory kit best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Svbony SV233 kit is designed for observing the Moon, planets, and bright double stars. The \u003cstrong\u003e6mm eyepiece\u003c\/strong\u003e (and 3mm with Barlow) is ideal for high-magnification views of Jupiter's cloud bands, Saturn's rings, and craters on the Moon. The \u003cstrong\u003e17mm eyepiece\u003c\/strong\u003e provides lower magnification for wider views of the entire lunar disc or open star clusters like the Pleiades (M45).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the 2x Barlow lens included in the SV233 kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e2x Barlow lens\u003c\/strong\u003e is placed into your telescope's 1.25\" focuser first. You then insert an eyepiece, like the 17mm Plössl, into the top of the Barlow. This doubles the eyepiece's native magnification, turning the 17mm into an 8.5mm. It's an easy way to get more power without buying additional eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen should I use the different filters in the Svbony SV233 kit for observing the Moon?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor lunar observation, you have two primary options in the SV233 kit:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoon Filter:\u003c\/strong\u003e Use this during most phases of the Moon, especially from first quarter to full moon. It cuts the overwhelming glare, which reduces eye strain and brings out subtle contrast in craters and rays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eND Filter:\u003c\/strong\u003e This provides a stronger light reduction than the Moon filter. It's most useful when observing a full or near-full moon through a larger aperture telescope (over 6 inches), where the brightness can be intense.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 3.5mm eye relief on the 6mm eyepiece in the SV233 kit suitable for eyeglass wearers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the \u003cstrong\u003e3.5mm eye relief\u003c\/strong\u003e on the 6mm eyepiece is very short. Eyeglass wearers will find it impossible to see the full 48° field of view because their glasses prevent their eye from getting close enough. To use this eyepiece, you will need to remove your glasses. The 17mm eyepiece, with its \u003cstrong\u003e12.5mm eye relief\u003c\/strong\u003e, is more accommodating for observers who wear glasses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat telescopes are compatible with the Svbony SV233 accessory kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit is compatible with any telescope that accepts standard \u003cstrong\u003e1.25\" eyepieces\u003c\/strong\u003e. This includes the vast majority of consumer refractors, reflectors, Schmidt-Cassegrains, and Maksutov-Cassegrains from brands like Celestron, Meade, Orion, Sky-Watcher, and Svbony itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the filters from the SV233 kit to the eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eEach eyepiece and the Barlow lens have standard \u003cstrong\u003eM28.5x0.6mm\u003c\/strong\u003e female threads on the bottom of their chrome barrels. Simply screw your chosen filter (e.g., the Moon filter) into these threads until it is finger-tight. The filter will then be securely in the light path.\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\u003eEyepiece Type\u003c\/td\u003e\n\u003ctd\u003ePlössl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Focal Lengths\u003c\/td\u003e\n\u003ctd\u003e6mm \u0026amp; 17mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent Field of View\u003c\/td\u003e\n\u003ctd\u003e48° (both eyepieces)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Relief\u003c\/td\u003e\n\u003ctd\u003e3.5mm (on 6mm), 12.5mm (on 17mm)\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Edges\u003c\/td\u003e\n\u003ctd\u003eBlackened\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarlow Magnification\u003c\/td\u003e\n\u003ctd\u003e2x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarlow Lens Design\u003c\/td\u003e\n\u003ctd\u003e2-Elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarlow Threads\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 (T-threads)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Filters\u003c\/td\u003e\n\u003ctd\u003eMoon Filter, ND Filter, #82A Color Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM28.5x0.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum Alloy, Glass\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\"\u003e6mm Plössl 1.25\" Eyepiece\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e17mm Plössl 1.25\" Eyepiece\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2x Barlow Lens 1.25\"\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMoon Filter 1.25\"\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eND Filter 1.25\"\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e#82A Light Blue Filter 1.25\"\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Set\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\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":52861266526493,"sku":"SV-W9190A","price":53.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV233-7-Piece-Telescope-Accessory-Kit-Plossl-Eyepiece-Filter-1_dad8d6cb-0f09-45e9-96e9-648aa54d5f4e.jpg?v=1788660808"}],"url":"https:\/\/davidastro.com\/collections\/svbony-eyepieces.oembed","provider":"David Astro","version":"1.0","type":"link"}