{"product_id":"svbony-sv106-50mm-guide-scope","title":"SVBONY SV106 50mm f\/3.8 Guide Scope with Helical Focuser","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6387090574212646935767561.jpg?v=1791669826\" alt=\"SVBONY SV106 50mm guide scope key visual\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SVBONY SV106 (item F9177A) is a 50 mm achromatic guide scope with a 190 mm focal length (f\/3.8) and a built-in helical focuser. It mounts on top of your main telescope with the included rings and dovetail rail and carries a guide camera on the male T-thread of its focuser collar. The tube is 54.5 mm in diameter, 240 mm long, and the optics are fully multi-coated. It also works as a straight-through finder with a 1.25″ eyepiece.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f9177a-1_20250807174813_4963_20260820160610_2851.webp?v=1791670107\" alt=\"SVBONY SV106 50mm guide scope\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you are setting up autoguiding for deep-sky imaging and want a compact, short-focal-length guide scope that finds guide stars easily, or a finder that doubles as a guide scope.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f9177a-2_20250807174813_4984.jpg?v=1791670107\" alt=\"SVBONY SV106 50mm guide scope detail\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e50 mm f\/3.8 achromat:\u003c\/strong\u003e 190 mm focal length gives a wide field for picking up guide stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelical focuser with 8 mm travel:\u003c\/strong\u003e knurled fine-focus ring and thumbscrew lock, designed to avoid flexure while focusing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30 mm telescoping drawtube:\u003c\/strong\u003e for coarse focus range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-thread on the focuser collar:\u003c\/strong\u003e accepts guide cameras with a female T-thread.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFully multi-coated optics.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6387090574250660186849671.jpg?v=1791669827\" alt=\"SVBONY SV106 helical focuser graphic\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe SV106 is a 50 mm achromatic refractor working at f\/3.8. For guiding, the short focal length matters more than colour correction: it gives a wide field so a guide star is easy to find, while the helical focuser holds focus without the shift a rack-and-pinion focuser can introduce under a camera's weight.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutoguiding\u003c\/strong\u003e deep-sky imaging rigs with a guide camera on the T-thread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder scope\u003c\/strong\u003e with a 1.25″ eyepiece (sold separately).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6387090574284261426185470.jpg?v=1791669826\" alt=\"SVBONY SV106 rings and dovetail graphic\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e two guide scope rings and a 3.5″ dovetail bar fit standard finder-scope bases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide camera:\u003c\/strong\u003e male T-thread on the focuser collar for cameras with a female T-thread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepieces:\u003c\/strong\u003e 1.25″, sold separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOther styles:\u003c\/strong\u003e SVBONY also lists the SV106 with an SV152 illuminated eyepiece and with an SV905C camera and dovetail. Contact us for those bundles.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6387090574316847111923750.jpg?v=1791669826\" alt=\"SVBONY SV106 guide camera connection graphic\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWhat's in the Box\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSV106 50 mm guide scope with helical focuser\u003c\/li\u003e\n\u003cli\u003eTwo guide scope rings\u003c\/li\u003e\n\u003cli\u003eDovetail mounting bar\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eGuide camera and eyepiece sold separately.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder-shoe mounting:\u003c\/strong\u003e the included bar fits a standard finder-scope base on your main telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e SVBONY does not publish a weight for this item.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo. Slide the dovetail into your finder base, thread your guide camera onto the T-thread, set rough focus with the drawtube and fine focus with the helical ring, then lock it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich guide cameras fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCameras with a female T-thread connect directly to the focuser collar.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it as a finder?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes, with a 1.25″ eyepiece.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is it different from the SV106 60 mm?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis model is the 50 mm f\/3.8 version with 190 mm focal length; the 60 mm is a separate SVBONY product.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 50 mm f\/3.8 achromatic guide scope with a helical focuser, T-thread camera connection, rings and dovetail, for autoguiding or finder duty.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"SV106","offer_id":67722225811567,"sku":"F9177A","price":82.07,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f9177a-1_20250807174813_4963_20260820160610_2851.webp?v=1791670107","url":"https:\/\/ontariotelescope.com\/products\/svbony-sv106-50mm-guide-scope","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}