{"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","url":"https:\/\/davidastro.com\/fr\/products\/svbony-sv190-10mm-uf-ultra-flat-field-fmc-eyepiece-125in","provider":"David Astro","version":"1.0","type":"link"}