{"title":"Lunettes apochromatiques SVBONY","description":"\u003cp\u003eLes lunettes apochromatiques SVBONY utilisent du verre ED et des formules à plusieurs lentilles pour limiter le chromatisme, en visuel comme en astrophotographie. Les doublets ED SV503 80mm et 102mm f\/7 conviennent au visuel, tandis que le quadruplet SV503 de 70mm offre un champ plat pour l'imagerie. Le triplet SV550 80mm f\/6 et la 122mm poussent plus loin la correction chromatique.\u003c\/p\u003e\u003cp\u003eLes objectifs astrographes Petzval SV555 54mm f\/4.5 et SV545 45mm f\/4.5 sont des options compactes et rapides pour l'imagerie grand champ.\u003c\/p\u003e","products":[{"product_id":"svbony-sv503-ed-80mm-f7-doublet","title":"SVBONY SV503 ED 80mm F7 Doublet","description":"\u003c!-- more --\u003e\n\u003cp\u003e1.Rugged housing prevents damage;\u003c\/p\u003e\n\u003cp\u003e2.Sliding graceful and soft dual-speed focuser;\u003c\/p\u003e\n\u003cp\u003e3.Ed glass (S-FPL51) can produce very beautiful and clear images;\u003c\/p\u003e\n\u003cp\u003e4.The fully multilayer coated lens eliminates all reflections on the glass, and it has little or no chromatic aberration at high magnification.\u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\" border=\"0\"\u003e\n\u003ccolgroup\u003e\n\u003ccol\u003e\n\u003ccol\u003e\n\u003c\/colgroup\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSV503\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens Diameter \u003c\/td\u003e\n\u003ctd\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEye Piece Lens Description\u003c\/td\u003e\n\u003ctd\u003eED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e560 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003eF7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coated\u003c\/td\u003e\n\u003ctd\u003eUltra-wideband Coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens Type\u003c\/td\u003e\n\u003ctd\u003eDouble Separation Lens Structure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimit Magnitude\u003c\/td\u003e\n\u003ctd\u003e11.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSet The Light Force\u003c\/td\u003e\n\u003ctd\u003e130.6x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e1.5 Arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3950g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Tube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e103mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2 inch Dual Speed Focuser; The Gear Ratio 110\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Type\u003c\/td\u003e\n\u003ctd\u003eRack Pinion Design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackages\u003c\/td\u003e\n\u003ctd\u003e1x SV503 White 80ED F7 Telescope OTA (for observing and for astrophotography)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions\u003c\/td\u003e\n\u003ctd\u003e540mm*215mm*230mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":49024062980381,"sku":"SV-F9359B","price":580.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/image_06400c35-1e84-4d73-aa31-c62bfdd3378b.jpg?v=1723303339"},{"product_id":"svbony-sv555-54mm-f-4-5-petzval-apo-astrograph-lens","title":"SVBONY SV555 54mm f\/4.5 Petzval APO Astrograph Lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e54mm Aperture \/ 243mm Focal Length (f\/4.5)\u003c\/li\u003e\n\u003cli\u003e5-Element Petzval APO Optical Design\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003eVariable f\/4.5 to f\/22 Aperture Ring\u003c\/li\u003e\n\u003cli\u003eIncludes EAF Mounting Kit and 360° Rotator\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 SV555 54mm F4.5 Petzval APO Astrograph Lens\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV555 combines a 5-element Petzval optical system with the functionality of a professional telephoto lens, delivering a flat 44mm image circle for full-frame sensors. Its 54mm aperture and 243mm focal length produce a fast f\/4.5 focal ratio, while a unique variable aperture control allows you to stop down to f\/22 for enhanced control over star shapes and depth of field. This astrograph arrives ready for automation, including a mounting kit for popular electronic focusers right out of the box.\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 Petzval Optics: A 44mm Flat-Field Image Circle\u003c\/h3\u003e\n\u003cp\u003eThe SV555's core is a 5-element, 3-group Petzval objective that acts as its own field flattener, ensuring sharp, point-like stars across a full-frame 44mm image circle. This apochromatic (APO) design virtually eliminates chromatic aberration, rendering vivid, high-contrast images without color fringing. At a 243mm focal length, you can capture vast swaths of the Milky Way or frame large targets like the Andromeda Galaxy (M31) and the North American Nebula (NGC 7000) in a single shot.\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\u003ef\/4.5 to f\/22 Aperture Control: Unprecedented Imaging Flexibility\u003c\/h3\u003e\n\u003cp\u003eUnlike fixed-aperture astrographs, the SV555 features a manual aperture ring, adjustable from a wide-open f\/4.5 to a narrow f\/22. Shooting at the native f\/4.5 maximizes light gathering for faint deep-sky objects. Stopping down slightly can tighten star performance at the extreme edges of the field or increase contrast for lunar imaging, giving you a level of optical control typically reserved for camera lenses.\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\u003eIntegrated Imaging Train: 360° Rotator and Included EAF Mount\u003c\/h3\u003e\n\u003cp\u003eThe SV555 is engineered for a seamless imaging experience. It includes a dedicated mounting kit for popular EAF systems, a lockable 360° camera angle adjuster for precise framing, and a helical focuser for fine adjustments. A built-in 2\" filter holder sits within the optical train, allowing easy integration of light pollution or narrowband filters without altering your back focus. The 184mm Vixen-style dovetail plate provides a secure connection to your 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\u003eSvbony SV555 vs. William Optics RedCat 51: Aperture and Control\u003c\/h3\u003e\n\u003cp\u003eThe primary competitor in this category is the William Optics RedCat 51, a highly regarded Petzval astrograph. While both deliver a flat, full-frame field, the SV555 presents key differences.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAperture and Speed:\u003c\/strong\u003e The SV555 offers a slightly larger 54mm aperture and a faster f\/4.5 focal ratio compared to the RedCat's 51mm and f\/4.9. This translates to more light-gathering capability and shorter exposure times for the same target.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAperture Control:\u003c\/strong\u003e The SV555's defining feature is its variable f\/4.5-f\/22 aperture, offering creative control over star sharpness and depth of field. The RedCat 51 has a fixed f\/4.9 aperture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Svbony includes an EAF mounting kit in the box, a component that is typically an additional purchase for other astrographs.\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 SV555's Petzval design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e5-element Petzval design\u003c\/strong\u003e incorporates corrective optics directly into the main lens assembly. This means the Svbony SV555 produces a flat, corrected image field across its entire 44mm image circle without requiring a separate, external field flattener, simplifying your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the variable aperture (f\/4.5-f\/22) on the SV555 benefit astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe variable aperture gives you enhanced optical control. While the native \u003cstrong\u003ef\/4.5\u003c\/strong\u003e setting is best for capturing faint deep-sky objects, stopping down to f\/5.6 or f\/8 can slightly improve star shapes at the very edge of the frame or increase contrast on bright objects like the Moon. It also provides flexibility for terrestrial and daytime photography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Svbony SV555 with my full-frame camera like a Sony A7 or Canon R5?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Svbony SV555 is designed with a \u003cstrong\u003e44mm image circle\u003c\/strong\u003e, which fully illuminates the sensors of full-frame DSLR and mirrorless cameras. The back of the lens features a standard M48x0.75 male thread, allowing you to connect your camera with a brand-specific M48 T-ring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to attach an electronic focuser (EAF) to the SV555?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNothing extra. The Svbony SV555 \u003cstrong\u003eincludes an EAF mounting kit\u003c\/strong\u003e in the box. This kit is designed to attach popular ZWO EAF models directly to the helical focuser, allowing you to achieve automated, precise focusing right away.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SV555 perform on large targets like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV555's \u003cstrong\u003e243mm focal length\u003c\/strong\u003e provides a very wide field of view, making it ideal for large celestial targets. Paired with a full-frame camera, you can easily fit the entirety of the Andromeda Galaxy (M31) or the expansive nebulosity of the North American Nebula (NGC 7000) and the Pelican Nebula (IC 5070) within a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of filters can I use with the Svbony SV555?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Svbony SV555 has two filter mounting options. It features a \u003cstrong\u003ebuilt-in 2\" filter holder\u003c\/strong\u003e located inside the optical tube for standard 2-inch threaded filters. Additionally, the front of the lens has an \u003cstrong\u003eM72 thread\u003c\/strong\u003e for attaching larger front-mounted 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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Design\u003c\/td\u003e\n\u003ctd\u003ePetzval (5 Elements in 3 Groups)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e54mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e243mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5 - f\/22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003eΦ 44mm (Full Frame)\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\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eHelical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Rotator\u003c\/td\u003e\n\u003ctd\u003eLockable 360º\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM72 (Front), Internal 2\" Holder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eVixen-style Dovetail Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Length\u003c\/td\u003e\n\u003ctd\u003e184mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e2450g (excluding accessories)\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\"\u003eSV555 54mm f\/4.5 OTA\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\"\u003eEAF Mount Kit\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\"\u003eHandle with Vixen Finder Saddle\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\"\u003eDovetail Plate with M6 Holes\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\"\u003eCamera Angle Adjuster\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\" Filter Holder (Assembled)\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\"\u003ePlastic Lens Cover\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\"\u003eSoft Padded Case\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV555_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV555_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":52861222420765,"sku":"SV-F9395A","price":714.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV555-54mm-F4-5-Petzval-APO-Astrograph-Lens-for-CMOS-Cameras-1_a3ed004e-fffa-45ef-b871-d8d0bfddc691.jpg?v=1788884117"},{"product_id":"svbony-sv545-45mm-f-4-5-203mm-petzval-refractor-astrograph-lens","title":"SVBONY SV545 45mm f\/4.5 203mm Petzval Refractor Astrograph Lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e45mm Aperture\u003c\/li\u003e\n\u003cli\u003e203mm Focal Length (f\/4.5)\u003c\/li\u003e\n\u003cli\u003e5-Element Petzval Optical Design\u003c\/li\u003e\n\u003cli\u003eNative Flat-Field Astrograph\u003c\/li\u003e\n\u003cli\u003eHelical Focuser with 360º Rotator\u003c\/li\u003e\n\u003cli\u003eM48x0.75 Camera Connection\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\u003ePetzval Refractor Astrograph Lens | SVBONY SV545\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV545 is a dedicated wide-field astrograph, combining a fast f\/4.5 focal ratio with a 203mm focal length in a compact 45mm aperture optical system. Its 5-element Petzval design provides a natively flat field without the need for an external corrector, delivering sharp stars across the frame with any modern astronomy camera.\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\u003e45mm f\/4.5 Petzval Optics: 5 Elements for a Native Flat Field\u003c\/h3\u003e\n\u003cp\u003eThe SV545's optical core is a 5-element Petzval design arranged in 3 groups, engineered to eliminate field curvature right out of the box. This means you don't need a separate field flattener to achieve pinpoint stars, simplifying your imaging train and reducing costs. With a 45mm aperture and a fast f\/4.5 focal ratio, you can capture faint, extended objects like the North American Nebula (NGC 7000) or the Andromeda Galaxy (M31) with shorter exposure times.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-Coated (FMC) Optics:\u003c\/strong\u003e All air-to-glass surfaces are coated to maximize light transmission and contrast, ensuring rich color and detail in your images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide-Field Specialist:\u003c\/strong\u003e The 203mm focal length is purpose-built for capturing large swaths of the Milky Way and large-scale nebulae, not for high-magnification planetary viewing where its 45mm aperture would be a limitation.\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\u003eEAF-Ready Helical Focuser with 360° Rotation\u003c\/h3\u003e\n\u003cp\u003eAchieving critical focus is managed by a robust helical focuser designed for modern astrophotography workflows. The focuser is built to be compatible with popular Electronic Auto Focusers (EAFs), allowing you to automate your focusing routine for maximum sharpness. A lockable 360° rotator is integrated into the body, letting you frame your target perfectly without rotating your camera and upsetting your cable management.\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 Build: 2750g with an M48x0.75 Connection\u003c\/h3\u003e\n\u003cp\u003eThe SV545 is constructed with an all-metal body and sealed optics, providing durability for fieldwork in changing environmental conditions. At an estimated weight of 2750g, it remains portable enough for lightweight star trackers and travel mounts. The rear of the astrograph terminates in a standard M48x0.75 male thread, enabling a secure, direct connection to DSLRs (with an M48 T-ring), dedicated astronomy cameras, and filter wheels.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDovetail Plate Mount:\u003c\/strong\u003e A standard dovetail plate allows for quick and secure attachment to a wide range of equatorial mounts and trackers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplified Imaging Train:\u003c\/strong\u003e The standard M48 connection and native flat-field design remove the need for extra adapters and correctors, creating a more rigid and reliable optical setup.\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\"\u003eDo I need a field flattener or reducer for the SVBONY SV545?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The SVBONY SV545 uses a \u003cstrong\u003ePetzval optical design\u003c\/strong\u003e, which produces a natively flat imaging field without any external correctors. You can connect your camera directly and expect sharp stars from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my camera to the SV545 astrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV545 features a standard \u003cstrong\u003eM48x0.75 male thread\u003c\/strong\u003e at the back. You can connect most dedicated astronomy cameras and filter wheels directly. For a DSLR or mirrorless camera, you will need a corresponding M48 T-ring for your camera brand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV545's focuser compatible with an EAF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the product is designed with a helical focuser that is pre-equipped for mounting an Electronic Auto Focuser (EAF). This allows for precise, automated focusing during an imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the 2750g SVBONY SV545?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an estimated weight of 2750g, the SV545 is well-suited for portable star trackers (like a Sky-Watcher Star Adventurer) or small equatorial mounts. Its compact size and weight make it an excellent choice for a travel astrophotography setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the SV545 frame large targets like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e203mm focal length\u003c\/strong\u003e of the SVBONY SV545 is ideal for framing large deep-sky objects. When paired with a common APS-C or Micro Four Thirds sensor, it will comfortably capture the entirety of the Orion Nebula (M42), including the surrounding nebulosity and the Running Man Nebula (NGC 1977), in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV545 suitable for planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is not the ideal instrument for planets. The SV545 is a wide-field astrograph with a short 203mm focal length and small 45mm aperture. While you could see Jupiter's moons, it lacks the magnification and resolution needed to capture detail on planetary surfaces. A Schmidt-Cassegrain or Maksutov-Cassegrain would be a better choice for that purpose.\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\u003eObjective Type\u003c\/td\u003e\n\u003ctd\u003ePetzval Design (5 Elements in 3 Groups)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e203mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\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\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eHelical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Rotator\u003c\/td\u003e\n\u003ctd\u003eLockable 360º\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eDovetail Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEstimated Weight\u003c\/td\u003e\n\u003ctd\u003e2750g\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV545_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV545_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":52861222519069,"sku":"SV-W9317B","price":560.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Petzval-Refractor-Astrograph-Lens-SVBONY-SV545-1_52bd45d5-bd8a-43f0-a072-d31ac4045018.jpg?v=1788659396"},{"product_id":"svbony-sv503-102mm-f-7-ed-doublet-refractor-telescope-ota","title":"SVBONY SV503 102mm f\/7 ED Doublet Refractor Telescope OTA","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e102mm Aperture ED Doublet Refractor\u003c\/li\u003e\n\u003cli\u003e714mm Focal Length (f\/7)\u003c\/li\u003e\n\u003cli\u003eS-FPL51 Extra-Low Dispersion Glass\u003c\/li\u003e\n\u003cli\u003e1:10 Dual-Speed Rack \u0026amp; Pinion Focuser\u003c\/li\u003e\n\u003cli\u003e101.9mm of Back Focus\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 SV503 102mm f\/7 ED Doublet Refractor OTA\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV503 102mm f\/7 ED Doublet Refractor combines a 102mm aperture with S-FPL51 extra-low dispersion glass to deliver high-contrast images with minimal chromatic aberration. Its 714mm focal length provides a versatile f\/7 focal ratio suitable for a wide range of celestial targets, while the optical system achieves a theoretical resolving capacity of 1.17 arc-seconds. With a light gathering capacity 212 times that of the human eye, this telescope makes faint deep-sky objects accessible for both imaging and visual 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\u003eS-FPL51 ED Optics: A 102mm f\/7 Doublet for High-Contrast Imaging\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the SV503 is an air-spaced doublet objective featuring S-FPL51 ED glass, which significantly reduces false color (chromatic aberration) common in standard achromats. This correction results in sharp, high-contrast views of bright objects like Jupiter and the lunar terminator, with Super Multi-Coating (SMC) ensuring maximum light transmission. The 102mm aperture and moderate f\/7 focal ratio create a capable deep-sky instrument, resolving stars down to magnitude 12.1 under dark skies.\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\u003e1:10 Dual-Speed Focuser: 101.9mm of Back Focus for Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eThe SV503 is equipped with a robust Rack and Pinion (RAP) focuser, which eliminates the slippage and flexure associated with Crayford designs when supporting heavy imaging equipment. A 1:10 fine-focus knob allows for the critical adjustments needed to achieve sharp stars in astrophotography. With a generous 101.9mm of back focus, you have ample room to accommodate a full imaging train, including filter wheels, off-axis guiders, and dedicated astronomy cameras.\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\u003eImaging-Ready Build: A 5.7kg OTA with a 200mm Dovetail\u003c\/h3\u003e\n\u003cp\u003eConstructed from aluminum, the optical tube assembly measures 630mm in length and weighs 5.7kg with the included rings and dovetail, making it a stable and manageable payload for mid-range equatorial mounts. The package includes a 200mm long Vixen-style dovetail bar, providing a secure connection to your mount and allowing for easy balancing adjustments. This combination of moderate weight and rigid construction ensures the stability required for long-exposure astrophotography.\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 SV503 102mm vs. 80mm: Aperture and Light Gathering\u003c\/h3\u003e\n\u003cp\u003eWhile both the 102mm and 80mm SV503 models share the same f\/7 focal ratio and S-FPL51 glass, the choice between them comes down to aperture and portability. The SV503 102mm offers a clear advantage in light-gathering power and resolution, making it the superior choice for imaging smaller galaxies, resolving globular clusters, and capturing fine planetary detail.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSV503 102mm:\u003c\/strong\u003e Its larger aperture gathers 64% more light than the 80mm version, providing brighter images and revealing fainter details. This makes it better suited for targets where resolution is key.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSV503 80mm:\u003c\/strong\u003e The 80mm is significantly lighter and more compact, making it an ideal portable or \"grab-and-go\" telescope. Its shorter focal length (560mm) also provides a wider true field of view, which is advantageous for framing large emission nebulae like the North America Nebula (NGC 7000).\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 kind of mount is required for the SVBONY SV503 102mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a tube weight of \u003cstrong\u003e5.7kg\u003c\/strong\u003e, the SV503 102mm OTA requires a sturdy equatorial mount for astrophotography. A mount with a payload capacity of at least 20-25 lbs (9-11 kg) is recommended to ensure stability for long exposures. Examples include mounts in the Celestron AVX or Sky-Watcher HEQ5 class.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the SVBONY SV503 102mm perform on the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e102mm aperture\u003c\/strong\u003e and \u003cstrong\u003e714mm focal length\u003c\/strong\u003e are well-suited for framing large targets like the Andromeda Galaxy (M31). You will be able to capture the bright galactic core and its surrounding dust lanes. For a full field of view that includes its satellite galaxies M32 and M110, you may need to use a dedicated focal reducer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the S-FPL51 glass in the SV503 102mm good enough for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. \u003cstrong\u003eS-FPL51\u003c\/strong\u003e is an extra-low dispersion glass that provides excellent color correction, especially for a doublet design. While a more expensive triplet apochromat will offer a higher degree of correction, the SV503 102mm delivers sharp, high-contrast images with minimal purple fringing on bright stars, making it a very capable and affordable entry into serious astrophotography.\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 101.9mm back focus on the SV503 102mm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e101.9mm of back focus\u003c\/strong\u003e is the distance from the focuser's flange to the focal plane. This generous distance is crucial for astrophotography as it provides enough space to install accessories like filter wheels, off-axis guiders, and astronomy cameras while still being able to reach focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV503 102mm for visual observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While optimized for imaging, the SV503 102mm is an excellent visual instrument. Its \u003cstrong\u003e102mm ED objective\u003c\/strong\u003e provides crisp, high-contrast views of the Moon, planets, and bright deep-sky objects. The \u003cstrong\u003e1:10 dual-speed focuser\u003c\/strong\u003e makes it easy to snap objects into perfect focus visually.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see chromatic aberration with the SVBONY SV503 102mm ED doublet?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eS-FPL51 ED glass\u003c\/strong\u003e significantly suppresses chromatic aberration (false color). On extremely bright targets like Sirius or Vega at high magnification, a trace amount of residual color may be visible, which is typical for a doublet design. However, for the vast majority of astronomical targets, the color correction is excellent and will not detract from the 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\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eSVBONY SV503 102F7 ED Astronomy Telescope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eRefractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e102mm \/ 4.01-Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e714mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eS-FPL51 ED Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coating\u003c\/td\u003e\n\u003ctd\u003eSMC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eRack and Pinion (RAP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGear Reduction\u003c\/td\u003e\n\u003ctd\u003e1:10 Dual-Speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e101.9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e1.17\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd\u003e12.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power\u003c\/td\u003e\n\u003ctd\u003e212x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e204x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Weight (with rings)\u003c\/td\u003e\n\u003ctd\u003e5.7kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e630mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e121mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Hardware\u003c\/td\u003e\n\u003ctd\u003eDovetail \u0026amp; Rings Included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Length\u003c\/td\u003e\n\u003ctd\u003e200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Dimensions\u003c\/td\u003e\n\u003ctd\u003e690mm x 210mm x 250mm\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV503_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSV503 102mm f\/7 ED Refractor OTA\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\"\u003eTube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003e200mm Vixen-Style Dovetail Bar\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\"\u003eLens Cover\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\"\u003e1.25\" Dust Cap\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV503_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":52861224911133,"sku":"SV-F9359D","price":735.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-ED-Doublet-Refractor-Telescope-for-Astrophotography-SV503-102-1_4eabcc19-7193-438f-9fa5-298e4da81a5c.jpg?v=1788659463"},{"product_id":"svbony-sv503-70mm-f-6-78-quadruplet-ed-flatfield-refractor-telescope-ota","title":"SVBONY SV503 70mm f\/6.78 Quadruplet ED Flatfield Refractor Telescope OTA","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e70mm Aperture Quadruplet Astrograph\u003c\/li\u003e\n\u003cli\u003e474mm Focal Length (f\/6.78)\u003c\/li\u003e\n\u003cli\u003e32mm Corrected Flat-Field Image Circle\u003c\/li\u003e\n\u003cli\u003e2.5\" Rack-and-Pinion Focuser\u003c\/li\u003e\n\u003cli\u003e127.5mm Working Distance\u003c\/li\u003e\n\u003cli\u003eFPL51 and Lanthanum ED Glass Elements\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 SV503 70mm f\/6.78 ED Flatfield Refractor\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV503 70 refractor is a purpose-built astrograph, combining a 70mm aperture and 474mm focal length into a compact f\/6.78 optical system. Its 4-element design, featuring FPL51 and lanthanum glass, delivers a fully corrected 32mm flat-field image circle, eliminating the need for a separate flattener. Weighing just 5.9 lbs, this telescope provides a generous 127.5mm of working distance from its 2.5\" focuser for complex imaging trains.\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\u003eQuadruplet Optics: A 32mm Flat-Field Imaging Circle\u003c\/h3\u003e\n\u003cp\u003eThe SV503 70 integrates a 2-element objective with a 2-element corrector, creating a 4-element \"quadruplet\" design that corrects for field curvature internally. This system produces a 32mm diameter image circle with 100% correction, ensuring pinpoint stars across the frame of popular APS-C and smaller astronomy cameras. The use of FPL51 and lanthanum glass in the objective minimizes chromatic aberration for high-contrast images with true-to-life color.\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\u003eImaging-Ready Mechanics: 2.5\" Focuser and 127.5mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eEngineered for astrophotography, the SV503 70 features a robust 2.5\" rack-and-pinion (RAP) focuser capable of supporting heavy camera packages without flexure or slippage. A critical feature for imagers is the 127.5mm (5\") of working distance available from the 2\" receptacle. This generous back focus provides ample room for adding accessories like filter wheels, off-axis guiders, and rotators into your optical train, while the M54x0.75 female thread offers a direct, secure connection.\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\u003eWide-Field Astrograph: 474mm Focal Length for Large Targets\u003c\/h3\u003e\n\u003cp\u003eWith its 474mm focal length, the SV503 70 is ideal for capturing expansive celestial objects that are too large for longer telescopes. This field of view is perfectly suited for framing the entirety of the Andromeda Galaxy (M31), the North American Nebula (NGC 7000), or vast star-forming regions in Cygnus. The f\/6.78 focal ratio provides a good balance between image scale and exposure time, making it an efficient instrument for gathering light on faint deep-sky 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\u003eSV503 70 vs. a Standard ED Doublet: Integrated Flattener Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a standard 70mm ED doublet refractor may have a lower initial cost, it requires a separate field flattener to achieve the same photographic results as the SV503 70. This adds complexity and potential frustration in getting the spacing correct. The SV503's integrated quadruplet design offers a significant advantage:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Spacing Calculation:\u003c\/strong\u003e The flattener is built-in and permanently fixed at the optimal distance. You simply attach your camera and focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Connections:\u003c\/strong\u003e A simpler, more rigid imaging train means less potential for tilt or flexure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-Effective System:\u003c\/strong\u003e When factoring in the price of a quality external flattener, the SV503 70 often represents a better total value for a complete imaging setup.\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 size camera sensor is the SVBONY SV503 70 best suited for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV503 70 provides a fully corrected, flat-field image circle of \u003cstrong\u003e32mm\u003c\/strong\u003e. This is ideal for cameras with APS-C format sensors and any smaller sensors, ensuring sharp, pinpoint stars from corner to corner without vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV503 70 for visual observing out of the box?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This telescope is an astrograph, meaning its focus point is optimized for a camera sensor placed far behind the focuser. To use it visually with an eyepiece, you will need to add a \u003cstrong\u003ediagonal or a 2\" extension tube\u003c\/strong\u003e to achieve focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the SV503 70 frame a large target like the Andromeda Galaxy (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e474mm focal length\u003c\/strong\u003e of the SV503 70 is perfectly matched for large targets. When paired with a typical APS-C camera, it allows you to capture the entire Andromeda Galaxy (M31) and its satellite galaxies M32 and M110 in a single, well-composed frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat accessories can I connect to the SV503 70's 2.5\" focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe focuser terminates in a 2\" receptacle and also has a female \u003cstrong\u003eM54x0.75 thread\u003c\/strong\u003e for direct connections. With \u003cstrong\u003e127.5mm of back focus\u003c\/strong\u003e, it provides ample space to install a complete imaging train, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFilter wheels or filter drawers\u003c\/li\u003e\n\u003cli\u003eOff-axis guiders (OAGs)\u003c\/li\u003e\n\u003cli\u003eField rotators\u003c\/li\u003e\n\u003cli\u003eYour astronomy camera\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 SVBONY SV503 70 a good choice for imaging nebulae from my backyard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Its \u003cstrong\u003ef\/6.78 focal ratio\u003c\/strong\u003e is efficient for collecting data on faint nebulae. From a light-polluted location, pairing the SV503 70 with a duo-narrowband filter is highly effective for isolating the hydrogen-alpha and oxygen-III signals of emission nebulae like the Lagoon Nebula (M8) or the Eagle Nebula (M16).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount do I need for the SVBONY SV503 70?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe telescope tube and its included accessories weigh only \u003cstrong\u003e5.9 lbs (2685g)\u003c\/strong\u003e. This lightweight design makes it an excellent match for portable German equatorial mounts with a payload capacity of 10-15 lbs or more, such as a Sky-Watcher Star Adventurer GTi or similar tracker.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e70mm \/ 2.8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e474mm \/ 18.7\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.78\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Type\u003c\/td\u003e\n\u003ctd\u003e2-Element ED lens with FPL51 and lanthanum special glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrector\u003c\/td\u003e\n\u003ctd\u003e2-element corrector installed in the tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrected Image Circle\u003c\/td\u003e\n\u003ctd\u003e32mm \/ 1.3\" (100% correction)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2.5\" RAP focuser with 2\" reduction adapter and M54x0.75 female thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Distance\u003c\/td\u003e\n\u003ctd\u003e127.5mm \/ 5\" (from 2\" receptacle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length (min)\u003c\/td\u003e\n\u003ctd\u003e365mm \/ 14.4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e82mm \/ 3.2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDew Shield Diameter\u003c\/td\u003e\n\u003ctd\u003e93mm \/ 3.7\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight (incl. accessories)\u003c\/td\u003e\n\u003ctd\u003e2685g \/ 5.9lb\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV503_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSV503 70mm f\/6.78 OTA\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\" to 1.25\" Adapter\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\"\u003eLens Cover\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\"\u003eTelescope Tube Rings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 Pair\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\"\u003eDovetail Plate\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\"\u003e1.25\" Dust Cover\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\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV503_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":52861225042205,"sku":"SV-F9359E","price":503.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Flatfield-Refractor-Telescope-for-Astrophotography-SV503-70-1_8e5ac16e-a3b5-434c-af5c-80477adf5d6c.jpg?v=1788884053"},{"product_id":"svbony-sv550-80mm-f-6-apo-triplet-refractor-telescope-ota","title":"SVBONY SV550 80mm f\/6 APO Triplet Refractor Telescope OTA","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e80mm Aperture Apochromatic Triplet Refractor\u003c\/li\u003e\n\u003cli\u003e480mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/6 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eFPL51 ED Glass Element for Color Correction\u003c\/li\u003e\n\u003cli\u003eResolving Power of 1.45 arc seconds\u003c\/li\u003e\n\u003cli\u003eLightweight 2900g Optical Tube\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\u003eAPO Refractor Telescope Triplet SVBONY SV550 80\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV550 80mm APO Triplet refractor combines a fast f\/6 focal ratio with a 480mm focal length for wide-field astrophotography. Its three-element apochromatic lens design, featuring FPL51 ED glass, achieves a theoretical resolution of 1.45 arc seconds by virtually eliminating chromatic aberration. The optical tube assembly itself weighs only 2900g, making it an ideal imaging instrument for portable equatorial 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\u003eApochromatic Triplet Optics: 80mm of FPL51 Color Correction\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the SV550 is an 80mm air-spaced triplet objective. One of the elements is genuine FPL51 extra-low dispersion (ED) glass, which provides excellent color correction by bringing red, green, and blue wavelengths to a single, sharp focus. This apochromatic design prevents the distracting purple fringing around bright stars common in simpler scopes, delivering high-contrast images with a limiting stellar magnitude of 11.6.\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\u003eWide-Field Imaging at f\/6: A 480mm Focal Length Sweet Spot\u003c\/h3\u003e\n\u003cp\u003eThe SV550's 480mm focal length and f\/6 ratio are perfectly suited for capturing large deep-sky objects. This field of view allows you to frame expansive targets like the Andromeda Galaxy (M31) or the entire Veil Nebula complex in a single shot with most modern astronomy cameras. The fast optical system gathers significant light quickly, reducing the required exposure time for faint 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\u003ePortable 2900g Build: Sized for Grab-and-Go Mounts\u003c\/h3\u003e\n\u003cp\u003eWith a barrel weight of just 2900g (2.9 kg) and a compact length of 377.8mm, the SV550 is engineered for portability. This low weight places minimal strain on mid-range equatorial mounts, ensuring stable tracking for long-exposure astrophotography without requiring a massive, observatory-class setup. The 103mm outer tube diameter and 150-175mm dovetail plate provide a standard, rigid connection to your 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\u003eSV550 80mm Triplet vs. Standard ED Doublets: The Third Element Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a standard ED doublet refractor offers good color correction, the SV550's triplet design provides a superior level of performance, particularly for imaging. The third lens element allows for more precise control over the entire visual spectrum, resulting in tighter stars and higher contrast.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChromatic Aberration:\u003c\/strong\u003e The triplet design of the SV550 provides a higher degree of color correction than two-element lenses, which is critical for preventing star bloat and color halos in astrophotography.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImage Contrast:\u003c\/strong\u003e By focusing all colors to a single point, the SV550 produces a darker sky background and reveals more subtle details in planetary features and faint nebulosity.\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 kind of mount is required for the SVBONY SV550 80mm telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a barrel weight of 2900g, the SV550 80mm is well-suited for mid-sized equatorial mounts. For astrophotography, a mount with a payload capacity of at least 20 lbs (9 kg), such as a Sky-Watcher HEQ5 or iOptron CEM26, is recommended to ensure stable, precise tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the FPL51 glass in the SV550 improve my images?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eFPL51\u003c\/strong\u003e is a high-grade, extra-low dispersion (ED) glass that minimizes chromatic aberration. This means it corrects for \"false color,\" preventing purple halos from appearing around bright stars. The result is sharper stars, higher contrast, and more accurate color rendition in your astrophotos.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV550 80mm f\/6 good for viewing planets like Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SV550's apochromatic optics provide excellent, high-contrast views of the planets. While its 480mm focal length is optimized for wide-field imaging, you can use a high-quality Barlow lens to increase the magnification for detailed views of Jupiter's cloud bands, Saturn's rings, and features on Mars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat deep-sky objects can I image with the SV550's 480mm focal length?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 480mm focal length is ideal for large celestial targets. With the SVBONY SV550, you can easily capture:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe entire Andromeda Galaxy (M31)\u003c\/li\u003e\n\u003cli\u003eThe North America Nebula (NGC 7000)\u003c\/li\u003e\n\u003cli\u003eThe Pleiades star cluster (M45)\u003c\/li\u003e\n\u003cli\u003eThe Heart and Soul Nebulae (IC 1805 and IC 1848)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main benefit of an APO triplet like the SV550 over a standard doublet refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is superior color correction. A triplet lens, especially one with FPL51 glass like the SV550, brings the red, green, and blue wavelengths of light to a much tighter focus than a two-lens doublet. This eliminates color fringing and produces sharper, higher-contrast images, which is especially critical for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 1.45 arc second resolution of the SV550 mean for my images?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eResolution, or Dawes' Limit, is the theoretical ability of a telescope to distinguish between two closely spaced objects, like the individual stars in a tight double star system. A resolution of \u003cstrong\u003e1.45 arc seconds\u003c\/strong\u003e means the 80mm aperture of the SV550 can resolve very fine details, limited only by atmospheric seeing 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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Type\u003c\/td\u003e\n\u003ctd\u003eRefractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003eApochromatic Triplet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e480mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eED Glass\u003c\/td\u003e\n\u003ctd\u003eFPL51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e1.45 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e11.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eSMC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e2900g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e377.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e103mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Plate Length\u003c\/td\u003e\n\u003ctd\u003e150-175mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e3750g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e3850g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Size\u003c\/td\u003e\n\u003ctd\u003e440 x 220 x 210mm\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV550_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV550_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":52861225140509,"sku":"SV-F9381A","price":783.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-APO-refractor-Telescope-Triplet-SV550-80-1-F9381C_48487187-548c-46bd-a70c-e7332fdaa648.jpg?v=1788884093"},{"product_id":"svbony-sv550-122mm-apo-refractor-telescope-ota","title":"SVBONY SV550 122mm APO Refractor Telescope OTA","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e80mm Aperture\u003c\/li\u003e\n\u003cli\u003ef\/6 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e480mm Focal Length\u003c\/li\u003e\n\u003cli\u003eApochromatic Triplet Lens with FPL-51 ED Glass\u003c\/li\u003e\n\u003cli\u003eSuper Multi-Coated (SMC) Optics\u003c\/li\u003e\n\u003cli\u003e2900g Barrel Weight\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 SV550 80mm f\/6 APO Triplet Refractor Telescope\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV550 80mm f\/6 APO Triplet Refractor delivers true apochromatic imaging with its 80mm aperture and 480mm focal length. Its air-spaced triplet lens, featuring one FPL-51 ED glass element, achieves a theoretical resolution of 1.45 arc seconds and reaches a limiting stellar magnitude of 11.6, producing high-contrast images free of false color.\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\u003e80mm f\/6 Triplet APO: High-Contrast Views with FPL-51 Glass\u003c\/h3\u003e\n\u003cp\u003eAt the core of the SV550 is an 80mm air-spaced apochromatic triplet objective. This design utilizes an FPL-51 Extra-low Dispersion (ED) glass element to precisely focus red, green, and blue wavelengths to the same point, virtually eliminating the chromatic aberration or \"purple fringing\" seen in simpler achromats and some ED doublets. The Super Multi-Coated (SMC) optics ensure maximum light transmission for bright, high-contrast views of both planetary details and 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\u003eA 480mm Focal Length for Wide-Field Astrophotography\u003c\/h3\u003e\n\u003cp\u003eWith a native focal length of 480mm and a fast f\/6 focal ratio, the SV550 80 is optimized for wide-field astrophotography. This combination is ideal for capturing large celestial targets like the Andromeda Galaxy (M31), the Pleiades (M45), or sweeping regions of the Milky Way. For imagers seeking pinpoint stars across the entire frame, the addition of a dedicated field flattener is necessary to correct for natural field curvature.\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\u003e2900g OTA: A Portable Platform for Modern Mounts\u003c\/h3\u003e\n\u003cp\u003eThe optical tube assembly weighs in at a manageable 2900g (barrel weight), making the SV550 80 an excellent choice for portable imaging setups. This low weight reduces the demands on your equatorial mount, allowing for stable tracking on a wide variety of platforms, from compact star trackers to mid-size GoTo mounts. The telescope includes a 150-175mm dovetail plate for secure and straightforward mounting.\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\u003eSV550 80 APO vs. Standard 80mm ED Doublets: The Triplet Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile an 80mm ED doublet refractor offers good color correction, the SV550's triplet design provides a superior level of performance, particularly for astrophotography.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eED Doublet Advantage:\u003c\/strong\u003e Doublets are typically lighter, cool down faster, and are more affordable, making them excellent visual instruments and entry points into imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSV550 Triplet Advantage:\u003c\/strong\u003e The third lens element in the SV550 allows for a higher degree of color correction, significantly reducing residual spherical and chromatic aberration. This results in tighter star points and a complete absence of color fringing on bright objects like Sirius or Vega, a critical factor for producing clean, high-fidelity astrophotos.\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 kind of mount do I need for the SVBONY SV550 80 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith a barrel weight of \u003cstrong\u003e2900g\u003c\/strong\u003e, the SV550 80 is relatively lightweight. For visual use, a solid alt-azimuth mount is sufficient. For long-exposure astrophotography, a German equatorial mount with a payload capacity of at least 15-20 lbs (like a Celestron AVX or Sky-Watcher HEQ5) is recommended to handle the telescope plus a camera, guidescope, and other accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SV550 80's FPL-51 glass perform on bright stars like Vega?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe apochromatic triplet design incorporating \u003cstrong\u003eFPL-51 ED glass\u003c\/strong\u003e is specifically engineered to minimize chromatic aberration. When focused on a bright, blue-white star like Vega, you will see a clean, sharp point of light without the distracting purple halo common in achromatic or less-corrected doublet refractors. This high level of color fidelity is a key benefit for both visual observers and astrophotographers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a field flattener for imaging with the SVBONY SV550 80?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Like all refractors, the SV550 80 has natural field curvature, which can cause stars at the edge of an image to appear slightly elongated. To achieve pinpoint stars across the entire field of view, especially with cameras using APS-C or larger sensors, a dedicated field flattener is essential. The SVBONY SV209 0.8x reducer\/flattener is designed for this purpose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV550 80 suitable for planetary viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile its \u003cstrong\u003e480mm focal length\u003c\/strong\u003e is optimized for wide-field deep-sky objects, the SV550 80's high-quality apochromatic optics make it a capable planetary instrument. By using a high-quality Barlow lens to increase the magnification, you can achieve sharp, high-contrast views of Jupiter's cloud bands, Saturn's rings, and details on Mars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV550 80 for visual astronomy on targets like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The \u003cstrong\u003ef\/6 focal ratio\u003c\/strong\u003e and 80mm aperture provide a bright, wide field of view that is perfect for large deep-sky objects. With a low-power, wide-field eyepiece, the Orion Nebula (M42), the Andromeda Galaxy (M31), and large open clusters like the Pleiades (M45) will be beautifully framed against a dark sky background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 1.45 arc second resolution of the SV550 80 mean in practice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e1.45 arc second\u003c\/strong\u003e resolution (Dawes' Limit) represents the telescope's theoretical ability to distinguish between two closely spaced stars under perfect atmospheric conditions. This resolving power allows you to split tight double stars like Albireo (Beta Cygni) with distinct color separation and to discern fine details in lunar craters and planetary features.\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\u003eTelescope Type\u003c\/td\u003e\n\u003ctd\u003eApochromatic Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e480mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Triplet Apochromatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eED Glass\u003c\/td\u003e\n\u003ctd\u003eFPL-51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eSMC (Super Multi-Coated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e1.45 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e11.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e103mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Length\u003c\/td\u003e\n\u003ctd\u003e377.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Weight\u003c\/td\u003e\n\u003ctd\u003e2900g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e3750g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGross Weight\u003c\/td\u003e\n\u003ctd\u003e3850g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Plate Length\u003c\/td\u003e\n\u003ctd\u003e150-175mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Size\u003c\/td\u003e\n\u003ctd\u003e440 x 220 x 210mm\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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV550_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV550_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\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":52861225238813,"sku":"SV-F9381C","price":1903.0,"currency_code":"CAD","in_stock":true}]}],"url":"https:\/\/davidastro.com\/fr-us\/collections\/svbony-apochromatic-refractors.oembed","provider":"David Astro","version":"1.0","type":"link"}