{"product_id":"svbony-sv48p-102-achromatic-refractor-ota","title":"SVBONY SV48P 102mm f\/6.5 Achromatic Refractor Telescope OTA with 2.5″ Dual-Speed Focuser","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385725975844161139386844.jpg?v=1791670118\" alt=\"SVBONY SV48P 102mm f\/6.5 achromatic refractor key visual\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe SVBONY SV48P 102 is a 102 mm achromatic refractor optical tube with a 663 mm focal length at f\/6.5. It uses an air-spaced doublet objective with full multi-coating, a 2.5″ rack-and-pinion dual-speed focuser with 1:10 fine focus and millimetre markings on the drawtube, and integral tube rings on a 210 mm dovetail plate.\u003c\/p\u003e\n\u003cp\u003eThe focuser takes 2″ accessories directly and 1.25″ accessories through the supplied adapter. The OTA weighs 3400 g and measures 720 × 270 × 230 mm.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385639312479542699673001.jpg?v=1791670117\" alt=\"SVBONY SV48P 102mm large aperture light-gathering panel\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis is a good match if you:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWant a bright, wide-field visual refractor:\u003c\/strong\u003e 102 mm at f\/6.5 frames star clusters, the Moon and larger nebulae with low-power eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eObserve the Moon and planets too:\u003c\/strong\u003e with the SV231 correction filter, SVBONY's recommended pairing, colour fringing on bright targets is reduced.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWant room to grow:\u003c\/strong\u003e the 2.5″ focuser and 2″ eyepiece support take wide-field eyepieces and heavier diagonals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAre choosing a first serious telescope:\u003c\/strong\u003e a refractor needs no collimation and is ready as soon as it is mounted.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e102 mm air-spaced achromatic doublet:\u003c\/strong\u003e fully multi-coated (FMC) for light transmission and contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e663 mm focal length, f\/6.5:\u003c\/strong\u003e a middle ground between fast wide-field and slow high-power refractors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.5″ rack-and-pinion dual-speed focuser:\u003c\/strong\u003e coarse focus plus 1:10 fine focus, with millimetre markings on the drawtube.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight-leak control:\u003c\/strong\u003e SVBONY designs the tube to reduce light leakage for a clearer view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegral tube rings on a 210 mm dovetail:\u003c\/strong\u003e holds the tube stable and the optics aligned.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder bracket:\u003c\/strong\u003e dovetail slots for a finder scope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385725980013568067881363.jpg?v=1791670117\" alt=\"SVBONY SV48P 102 2.5 inch dual-speed rack-and-pinion focuser\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385639312536133061105579.jpg?v=1791670118\" alt=\"SVBONY SV48P 102 light-leak reduction design\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385639312642410568399158.jpg?v=1791670117\" alt=\"SVBONY SV48P 102 integral tube rings and 210mm dovetail plate\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe SV48P uses a two-element, air-spaced achromatic objective. An achromat brings two wavelengths to a common focus, which gives sharp, high-contrast views across most of the visible spectrum; at f\/6.5 a faint violet fringe can show around the brightest objects such as the Moon's limb, Venus and Jupiter. SVBONY's SV231 chromatic aberration correction filter is designed to reduce that fringe.\u003c\/p\u003e\n\u003cp\u003eThe f\/6.5 focal ratio sits between fast f\/4–f\/5 instruments and slow f\/11–f\/15 instruments, giving a wider, brighter field than a long-focus refractor while keeping enough focal length for the Moon and planets. Full multi-coating on the lens surfaces keeps colours natural and the background dark.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385639312508347554601420.jpg?v=1791670118\" alt=\"SVBONY SV48P 102 f\/6.5 focal ratio comparison panel\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385639312563228196064239.jpg?v=1791670117\" alt=\"SVBONY SV48P 102 fully multi-coated objective lens\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide-field visual observing:\u003c\/strong\u003e open clusters, the Pleiades, the Double Cluster and bright nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLunar and planetary viewing:\u003c\/strong\u003e the Moon, Jupiter and Saturn at moderate magnification, best with the SV231 filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNebulae and galaxies:\u003c\/strong\u003e SVBONY positions the f\/6.5 ratio for brighter views of extended objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDaytime terrestrial viewing:\u003c\/strong\u003e with an erecting diagonal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepieces:\u003c\/strong\u003e 2″ directly, 1.25″ through the supplied adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual set-up:\u003c\/strong\u003e SVBONY describes using the SV48P with a diagonal, eyepiece and finder scope; none of these are included with the OTA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour correction:\u003c\/strong\u003e the SVBONY SV231 correction filter is SVBONY's recommended companion for bright targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 210 mm dovetail plate on integral rings. At 3400 g the OTA suits a sturdy alt-az or small equatorial mount.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocuser rotation:\u003c\/strong\u003e the focuser is not 360° rotatable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6385639334981608109564622.jpg?v=1791670118\" alt=\"SVBONY SV48P 102 with SV231 chromatic aberration correction filter\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sv48p-102-engineering-drawing_20251011092026_9322.jpg?v=1791670118\" alt=\"SVBONY SV48P 102 engineering drawing with dimensions\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat's in the Box\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e102 mm f\/6.5 telescope OTA\u003c\/li\u003e\n\u003cli\u003e210 mm dovetail mounting plate with tube rings\u003c\/li\u003e\n\u003cli\u003eFinder scope dovetail slots\u003c\/li\u003e\n\u003cli\u003e2″ to 1.25″ adapter\u003c\/li\u003e\n\u003cli\u003eLens cover\u003c\/li\u003e\n\u003cli\u003e1.25″ dust cover\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical tube only:\u003c\/strong\u003e no mount, tripod, diagonal, eyepiece or finder is included. SVBONY also offers the SV48P 102 in visual sets with these accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAchromatic optics:\u003c\/strong\u003e some false colour shows on the brightest targets at f\/6.5; the SV231 filter reduces it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisual first:\u003c\/strong\u003e the SV48P 102 is designed and described by SVBONY for visual observing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDew:\u003c\/strong\u003e a dew heater strip around the lens cell keeps the objective clear on humid nights.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The dovetail on the integral rings drops into the mount saddle, and a diagonal and eyepiece complete it. A refractor needs no collimation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it take 2″ eyepieces?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 2.5″ focuser accepts 2″ accessories directly, and the supplied adapter takes 1.25″ eyepieces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the fine-focus ratio?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1:10, on a rack-and-pinion focuser with millimetre markings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much does it weigh?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e3400 g for the OTA.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill I see false colour?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn the brightest objects a faint fringe is normal for an f\/6.5 achromat; SVBONY pairs the SV48P with its SV231 correction filter to reduce it.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn short: a 102 mm f\/6.5 air-spaced achromatic refractor with a 2.5″ dual-speed focuser, integral rings and a 210 mm dovetail, weighing 3400 g. Add a mount, a diagonal and eyepieces for bright, wide-field visual observing.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"OTA","offer_id":67722339680367,"sku":"F9341C","price":327.74,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sv48p-f9341c-1_20251127104331_9477.webp?v=1791670610","url":"https:\/\/ontariotelescope.com\/products\/svbony-sv48p-102-achromatic-refractor-ota","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}