{"product_id":"svbony-sv165-30mm-f-4-mini-guide-scope-with-helical-focuser","title":"SVBONY SV165 30mm f\/4 Mini Guide Scope with Helical Focuser","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210301339345582639.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm f\/4 mini 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 SV165 is a 30 mm f\/4 mini guide scope for autoguiding a deep-sky imaging rig. Its fully multi-coated achromatic objective gives a 120 mm focal length, and a helical focuser with 45 mm of travel brings the guide camera to focus. The camera end accepts 1.25″ nosepieces and M42 x 0.75 threads, with 26 mm of back focus. The aluminium tube has a sandblasted, oxidized finish, measures 112 mm long, and the scope weighs 342 g.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210352814645426311.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope overview for autoguiding\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210383610409199797.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope overview for deep-sky imaging rigs\" 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 image deep-sky targets on an equatorial mount and want a light, compact guide scope that adds little weight to the rig, or if you travel with a small imaging setup and need guiding without a bulky second telescope.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e30 mm f\/4 achromat:\u003c\/strong\u003e 120 mm focal length, fully multi-coated, for a wide guiding field with plenty of guide-star choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelical focuser:\u003c\/strong\u003e 45 mm of travel for fine, repeatable focus on guide stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual camera interface:\u003c\/strong\u003e 1.25″ slip-fit and M42 x 0.75 thread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing bracket with dovetail:\u003c\/strong\u003e two-ring bracket with nylon-tipped thumbscrews for aiming the scope, on a dovetail base.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNC 1\/4-20 mounting thread:\u003c\/strong\u003e for attaching to other mounting hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact aluminium body:\u003c\/strong\u003e 45 mm tube, 48 mm dew cap, 112 mm overall length, 342 g.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210415586416130148.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope key features and design\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210447102954270378.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope helical focuser and camera interface features\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210477003807333462.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope ring bracket and dovetail design\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe objective is a fully multi-coated 30 mm achromat working at f\/4. A 120 mm focal length paired with a small-pixel guide camera gives an image scale suited to guiding imaging telescopes of short to moderate focal length, and the fast focal ratio keeps guide stars bright at short guide exposures. The 26 mm back focus places the focal plane close to the end of the focuser, which suits dedicated guide cameras.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210506115595024038.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm f\/4 guide scope optical design\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210536910214483817.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope multi-coated achromatic objective\" style=\"max-width:100%;height:auto;\"\u003e\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 astrophotography with software such as PHD2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePortable and travel imaging rigs\u003c\/strong\u003e where weight and length matter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-exposure imaging\u003c\/strong\u003e on equatorial mounts that benefit from guided correction.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210565170762001478.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope recommended uses for autoguiding\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210593306237187127.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope on a portable imaging rig\" 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\u003eGuide cameras:\u003c\/strong\u003e SVBONY pairs it with the SV305 Pro and other guiding cameras; any camera with a 1.25″ nosepiece or M42 x 0.75 thread fits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e the supplied ring bracket and dovetail fit a finder-style dovetail shoe; a UNC 1\/4-20 thread is also provided.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack focus:\u003c\/strong\u003e 26 mm.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210621374469176651.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope camera and mounting compatibility\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210649413383639855.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope specifications and back focus\" 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\u003eSV165 30 mm f\/4 mini guide scope\u003c\/li\u003e\n\u003cli\u003eTwo-ring bracket with dovetail\u003c\/li\u003e\n\u003cli\u003eTwo nylon-tipped thumbscrews\u003c\/li\u003e\n\u003cli\u003eScrew tool\u003c\/li\u003e\n\u003cli\u003eDust cover\u003c\/li\u003e\n\u003cli\u003eLens cover\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6378423210679720818872180.jpg?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope package contents\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/6387013801407853357560252.gif?v=1791667864\" alt=\"SVBONY SV165 30mm guide scope animated product view\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide camera sold separately:\u003c\/strong\u003e this listing is the guide scope alone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepiece use:\u003c\/strong\u003e SVBONY notes that an extension tube is needed to reach focus with an eyepiece; the scope is designed around a guide camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDovetail shoe:\u003c\/strong\u003e your telescope or mounting plate needs a finder-style shoe or a 1\/4-20 attachment point.\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 a finder shoe, insert or thread the guide camera, and focus on a bright star with the helical focuser, then lock it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich guide cameras fit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCameras with a 1.25″ nosepiece or an M42 x 0.75 thread, including the SVBONY SV305 Pro.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat focal length of main telescope does it suit?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIts 120 mm focal length suits guiding short and moderate focal-length imaging telescopes, such as small refractors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it as a finder?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eVisual use needs an extension tube to reach focus with an eyepiece, per SVBONY.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 342 g, 30 mm f\/4 guide scope with a 120 mm focal length, helical focuser and 1.25″\/M42 camera fit, ready to guide a compact imaging rig once a guide camera is added.\u003c\/p\u003e","brand":"SvBony","offers":[{"title":"Default Title","offer_id":67721421521007,"sku":"W9125A","price":64.13,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/w9125a-1_20250806150319_0790_20260814162528_0004.webp?v=1791665151","url":"https:\/\/ontariotelescope.com\/products\/svbony-sv165-30mm-f-4-mini-guide-scope-with-helical-focuser","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}