{"product_id":"svbony-0-5x-focal-reducer-125in","title":"SVBONY 0.5X Focal Reducer - 1.25\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReduces telescope focal length by a 0.5x factor\u003c\/li\u003e\n\u003cli\u003eFits standard 1.25\" eyepieces and accessories\u003c\/li\u003e\n\u003cli\u003eThreads on via standard M28.5x0.6 filter threads\u003c\/li\u003e\n\u003cli\u003eFull metal aluminum alloy construction\u003c\/li\u003e\n\u003cli\u003ePure optical glass with anti-reflection coatings\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 0.5x Focal Reducer 1.25\" for Telescope Photography \u0026amp; Observing\u003c\/h2\u003e\n\u003cp\u003eThe Svbony 0.5x Focal Reducer transforms your telescope's capabilities by cutting its effective focal length in half, fitting into any standard 1.25\" eyepiece or camera nosepiece. This 0.5x reduction factor is achieved within a compact, 20mm tall all-metal housing that threads directly via a standard M28.5x0.6 interface.\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 0.5x Reduction Factor: Doubling Your Telescope's Field of View\u003c\/h3\u003e\n\u003cp\u003eBy halving your telescope's focal length, this reducer doubles the true field of view you see through the eyepiece. This wider perspective is essential for framing large deep-sky objects like the Andromeda Galaxy (M31) or the Pleiades star cluster (M45) that would otherwise be cut off. For astrophotography, the 0.5x reduction effectively converts an f\/10 system into a much faster f\/5 system, reducing required exposure times by a factor of four.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider Vistas:\u003c\/strong\u003e Capture expansive nebulae and star fields in a single frame without creating a mosaic.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFaster Imaging:\u003c\/strong\u003e Gather more light in less time, minimizing the impact of tracking errors and improving signal-to-noise ratio on faint targets.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Contrast:\u003c\/strong\u003e Fully anti-reflection coatings on the optical lens improve light transmission and reduce internal reflections for a clearer, higher-contrast image.\n\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\u003eMechanical Design: All-Metal Build with M28.5x0.6 Threads\u003c\/h3\u003e\n\u003cp\u003eConstructed from a single piece of black-anodized aluminum alloy, the Svbony reducer is built for durability and to minimize stray light. Its design incorporates the universal M28.5x0.6 thread standard used for 1.25\" filters. This allows it to attach securely to the base of any standard 1.25\" eyepiece or camera nosepiece, becoming an integral part of your optical train.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Construction:\u003c\/strong\u003e The full metal body ensures a secure fit and protects the internal optics from misalignment.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Standard M28.5x0.6 threads guarantee it will work with virtually any 1.25\" accessory that has a filter thread.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Profile:\u003c\/strong\u003e With a total height of only 20mm, the reducer adds minimal length to your imaging setup, helping to manage focuser back-travel requirements.\n\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 do I use the Svbony 0.5x Focal Reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou attach the Svbony 0.5x Focal Reducer by screwing it directly into the \u003cstrong\u003eM28.5x0.6 filter threads\u003c\/strong\u003e on the barrel of any standard 1.25\" eyepiece or a 1.25\" camera nosepiece. It attaches just like a color or moon filter.\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 the Svbony 0.5x Focal Reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is that it \u003cstrong\u003edoubles your field of view\u003c\/strong\u003e, allowing you to see large objects like the Andromeda Galaxy (M31) in their entirety. For astrophotography, it also halves your effective focal ratio (e.g., f\/10 becomes f\/5), which reduces required exposure times by a factor of four.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 0.5x reducer work with my 8-inch f\/10 Schmidt-Cassegrain telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Svbony 0.5x reducer is an excellent match for an SCT. It will convert your telescope to an f\/5 system, providing a much wider, brighter field of view that is ideal for visually observing large star clusters like the Pleiades (M45) and for imaging wide nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Svbony 0.5x reducer for both visual observing and astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. Visually, it delivers wider and brighter views, making it easier to locate and enjoy large celestial objects. For astrophotography with small-chip planetary or guide cameras, it allows you to capture much larger targets and significantly reduces required exposure times.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Svbony 0.5x reducer affect image quality?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the reducer features optical glass with anti-reflection coatings, all simple focal reducers can introduce some field curvature or coma at the edges of the field, especially in fast telescopes. This is a normal optical trade-off for the benefit of a much wider field of view and is typically minimal, especially near the center of the image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Svbony 0.5x reducer require me to change my focusing position?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, adding any optical element like a reducer will change the focus point of your telescope. You will need to rack your focuser \u003cstrong\u003einward\u003c\/strong\u003e to achieve a sharp image. Before purchasing, ensure your telescope has sufficient in-travel on its focuser.\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 Reduction\u003c\/td\u003e\n\u003ctd\u003e0.5x\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\u003eThread Interface\u003c\/td\u003e\n\u003ctd\u003eM28.5x0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSleeve Material\u003c\/td\u003e\n\u003ctd\u003eFull metal aluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Material\u003c\/td\u003e\n\u003ctd\u003ePure optical lens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Height\u003c\/td\u003e\n\u003ctd\u003e20mm\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":52861235003677,"sku":"SV-F9154A","price":15.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-0-5x-Focal-Reducer-1-25-for-Telescope-Photography-Observing-1_4e247e5b-f619-4837-86a3-301b42e20ecb.jpg?v=1788660066","url":"https:\/\/davidastro.com\/en-us\/products\/svbony-0-5x-focal-reducer-125in","provider":"David Astro","version":"1.0","type":"link"}