{"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","url":"https:\/\/davidastro.com\/fr\/products\/svbony-sv154-15mm-70-swa-telescope-eyepiece-125in","provider":"David Astro","version":"1.0","type":"link"}