{"title":"SVBONY Off-Axis Guiders \u0026 Guide Scopes","description":"\u003cp\u003eSVBONY guiding gear covers both ways to autoguide a long exposure. The SV238 off-axis guider picks off guide stars inside the main optical path, which avoids flexure on longer focal lengths. For separate guide scopes, the line runs from the SV165 30mm f\/4 and 40mm minis to the SV198 50mm and the SV106 50mm and 60mm f\/4.\u003c\/p\u003e\u003cp\u003eThe SV116 adjustable ring kit holds tubes from 43mm to 70mm in diameter.\u003c\/p\u003e","products":[{"product_id":"svbony-sv238-off-axis-guider-oag","title":"SVBONY SV238 Off-Axis Guider (OAG)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCorrects tracking errors and opto-mechanical flexure\u003c\/li\u003e\n\u003cli\u003eLarge 8 × 14 mm prism for bright guide stars\u003c\/li\u003e\n\u003cli\u003eSlim 12.5 mm body thickness preserves back focus\u003c\/li\u003e\n\u003cli\u003eSupports main imaging cameras up to APS-C sensor size\u003c\/li\u003e\n\u003cli\u003eIncludes M54 and M48 telescope adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV238 Off-Axis Guider (OAG)\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV238 Off-Axis Guider delivers exacting tracking accuracy by integrating a large 8 × 14 mm prism into a slim, 12.5 mm thick body. This design eliminates the differential flexure common with separate guidescopes, making it essential for long-exposure imaging with sensors up to APS-C format. With native M54 and M48 interfaces and a 1.25-inch port for guide cameras, the SV238 provides a rigid, precise connection in 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\u003eEliminating Flexure: The Advantage of an 8x14mm Prism\u003c\/h3\u003e\n\u003cp\u003eFor long-focal-length imaging, the greatest threat to sharp stars is differential flexure between the main telescope and a separate guidescope. The SV238 OAG solves this by using an 8 × 14 mm prism to pick off a small portion of the main telescope's light path. Any tracking error or mechanical shift seen by your guide camera is the exact same error seen by your main imaging camera, resulting in perfectly round stars.\u003c\/p\u003e\n\u003cp\u003eThe large prism size ensures you can find a suitable guide star even in sparse star fields, illuminating guide sensors from 1\/3\" to 1\/1.8\" effectively. This removes the need for a heavy, flexure-prone guidescope, simplifying your setup and improving overall image quality.\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 Slim 12.5mm Profile for Modern Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eBack focus is a critical and often limited resource in astrophotography. The SV238 OAG is engineered with a main body thickness of just 12.5 mm, consuming minimal space in your optical train. This slim profile allows you to easily incorporate other essential accessories like filter wheels and rotators while still reaching focus with your main camera.\u003c\/p\u003e\n\u003cp\u003eThe total optical path length is determined by the adapter used, with the M48 adapter adding 4 mm and the M54 adapter adding 5 mm. This compact and rigid CNC-machined aluminum body is designed to support cameras with sensors up to APS-C without causing vignetting on the guide prism.\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\u003ePrecision Adjustments for Pinpoint Guide Stars\u003c\/h3\u003e\n\u003cp\u003eAchieving optimal guiding requires precise focus on the guide star. The SV238 features a dedicated helical focuser for the 1.25-inch guide camera port, allowing for smooth, backlash-free adjustments to get your guide stars perfectly sharp. A sharp guide star enables your software to calculate centroids more accurately, leading to sub-pixel guiding corrections.\u003c\/p\u003e\n\u003cp\u003eFurthermore, the prism height is adjustable, allowing you to fine-tune its position. You can move the prism deeper into the light path to capture brighter stars or retract it to avoid vignetting the main sensor, providing the flexibility needed for various telescope and camera combinations.\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\u003eBroad Compatibility: M54, M48, and 1.25-inch Connections\u003c\/h3\u003e\n\u003cp\u003eThe SV238 is designed for maximum compatibility with common astrophotography equipment. It includes both M54 and M48 threaded adapters for connecting to a wide range of flatteners, reducers, and focusers. For connecting to cameras or filter wheels with smaller threads, M54-M42 and M48-M42 adapters are also included in the box.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope Interface:\u003c\/strong\u003e M54 and M48 adapters included for direct connection to your imaging train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide Camera Interface:\u003c\/strong\u003e A standard 1.25-inch holder with a helical focuser accepts most planetary and guide cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera Support:\u003c\/strong\u003e Provides an unvignetted guide field for main imaging cameras with sensors up to the APS-C format.\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 total optical path of the SVBONY SV238 OAG?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe total optical path length depends on the adapter you use. The main body of the SV238 OAG is \u003cstrong\u003e12.5 mm\u003c\/strong\u003e thick. To this, you add the thickness of the telescope-side adapter: the \u003cstrong\u003eM48 adapter is 4 mm\u003c\/strong\u003e and the \u003cstrong\u003eM54 adapter is 5 mm\u003c\/strong\u003e. Therefore, the total path length is 16.5 mm with the M48 adapter and 17.5 mm with the M54 adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set up the SV238 OAG with an SCT and an APS-C camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a Schmidt-Cassegrain Telescope (SCT) with a standard rear cell thread, you will typically need a reducer\/flattener that outputs an M48 or M54 thread. First, attach the appropriate adapter (M48 or M54) to the telescope side of the SV238. Then, connect your APS-C camera to the other side, using any necessary spacers to achieve the correct back focus for your flattener. Finally, insert your 1.25-inch guide camera into the helical focuser port and adjust both the prism height and helical focuser to get a sharp image of a guide star.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 8 × 14 mm prism on the SV238 vignette my main camera sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV238 is designed to work with main camera sensors \u003cstrong\u003eup to APS-C format\u003c\/strong\u003e without the prism obstructing the main light path. The prism height is also adjustable, allowing you to retract it slightly if you notice any shadowing on your flat frames, ensuring a clear field for your primary imaging camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the SV238 OAG find a guide star for imaging faint targets like the Pelican Nebula (IC 5070)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The large \u003cstrong\u003e8 × 14 mm prism\u003c\/strong\u003e intercepts a significant amount of light, increasing your chances of finding a suitable guide star, even when pointed at areas away from the dense Milky Way core. For a target like the Pelican Nebula, pairing the SV238 with a sensitive guide camera (recommended size \u003cstrong\u003e1\/3\" to 1\/1.8\"\u003c\/strong\u003e) should allow you to locate a guide star without issue.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat guide cameras are recommended for the SVBONY SV238?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV238 is optimized for guide cameras with sensor sizes ranging from \u003cstrong\u003e1\/3\" to 1\/1.8\"\u003c\/strong\u003e. This range includes popular and sensitive monochrome guide cameras that are well-suited for picking up faint guide stars through the OAG prism. The guide camera should have a standard 1.25-inch nosepiece to fit the helical focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I use the SV238 OAG instead of a separate guidescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn OAG like the SV238 eliminates the problem of \u003cstrong\u003edifferential flexure\u003c\/strong\u003e. This is when the main telescope and a separate, externally mounted guidescope physically shift slightly relative to each other during an exposure, causing elongated stars. Because the OAG uses the same light path as the main camera, it guides on the exact same motion, correcting for tracking errors, mirror flop, and tube flexure simultaneously.\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\u003ePrism Size\u003c\/td\u003e\n\u003ctd\u003e8 × 14 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOAG Body Thickness\u003c\/td\u003e\n\u003ctd\u003e12.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplicable Main Camera Sensor\u003c\/td\u003e\n\u003ctd\u003eUp to APS-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Guide Sensor Size\u003c\/td\u003e\n\u003ctd\u003e1\/3\" to 1\/1.8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Interface\u003c\/td\u003e\n\u003ctd\u003eM54 \/ M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM54 Adapter Thickness\u003c\/td\u003e\n\u003ctd\u003e5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM48 Adapter Thickness\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Camera Interface\u003c\/td\u003e\n\u003ctd\u003eScrew Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuide Camera Interface\u003c\/td\u003e\n\u003ctd\u003e1.25 inch with Helical Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrism Height Adjustable\u003c\/td\u003e\n\u003ctd\u003eSupported\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\"\u003eSV238 Off-Axis Guider Body\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\"\u003eM48 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\"\u003eM54-M42 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\"\u003eM48-M42 Adapter\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\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":52861226189085,"sku":"SV-W9196A","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Off-Axis-Guider-OAG-SV238-1_2de77cc6-de5b-4aea-951d-e2d295b77122.jpg?v=1788659524"},{"product_id":"svbony-sv106-50mm-guide-scope-with-helical-focuser","title":"SVBONY SV106 50mm Guide Scope with Helical Focuser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50mm Aperture\u003c\/li\u003e\n\u003cli\u003e190mm Focal Length (F3.8)\u003c\/li\u003e\n\u003cli\u003eZero-Flexure Helical Focuser\u003c\/li\u003e\n\u003cli\u003e8mm Focuser Travel\u003c\/li\u003e\n\u003cli\u003eIncludes Mounting Rings and Dovetail\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV106 Guide Scope 50mm with Helical Focuser\u003c\/h2\u003e\n\u003cp\u003eWith a 50mm aperture and a fast 190mm focal length (F3.8), the SVBONY SV106 Guide Scope delivers bright, wide-field views essential for locating faint guide stars. Its helical focuser provides 8mm of precise, repeatable travel for achieving sharp focus, while the standard 1.25-inch connection and integrated T-threads ensure a rigid connection to modern guide 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\u003eFast F3.8 Optics: Finding Guide Stars at 50mm\u003c\/h3\u003e\n\u003cp\u003eThe SV106's optical design is centered on speed and a wide field of view. The fast F3.8 focal ratio of its 50mm achromatic objective gathers ample light, making dimmer stars visible and increasing your odds of finding a suitable guide star in any part of the sky. This combination is ideal for guiding wide-field refractors and astrographs where a broad view is necessary to match the imaging field.\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\u003eZero-Flexure Helical Focuser with 8mm of Travel\u003c\/h3\u003e\n\u003cp\u003eMechanical flexure is the primary enemy of accurate guiding. The SV106 guide scope uses a helical focuser that eliminates the sag and shift common in standard drawtube designs. You achieve focus by rotating the barrel, not by sliding it, which maintains perfect alignment. With 8mm of fine adjustment controlled by a knurled ring and a thumbscrew to lock it in place, your guide camera remains rigidly fixed all night.\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\u003eReady to Mount: Rings for the 54.5mm Tube\u003c\/h3\u003e\n\u003cp\u003eThe SV106 arrives ready for immediate integration into your imaging rig. It includes a set of sturdy tube rings for its 54.5mm tube and a dovetail rail compatible with most standard finder scope bases. Nylon-tipped metal thumbscrews allow for precise aiming of the guide scope without marring the tube's finish. For connecting your camera, the focuser accepts standard 1.25-inch nosepieces and features male T-threads for a direct, secure attachment.\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\u003eSV106 Guide Scope vs. an Off-Axis Guider (OAG)\u003c\/h3\u003e\n\u003cp\u003eChoosing between a guide scope and an OAG involves a fundamental trade-off. An OAG uses the main telescope's light path, making it immune to differential flexure between two separate optical tubes, which is its primary advantage for very long focal length systems.\u003c\/p\u003e\n\u003cp\u003eThe SV106 guide scope, however, offers a significant advantage in usability. Its independent, wide field of view makes finding a suitable guide star dramatically easier than searching for one in the narrow, dim periphery of an OAG's pick-off prism. For portable setups and telescopes under 1500mm focal length, a well-mounted guide scope like the SV106 provides a more straightforward and often more successful guiding experience.\u003c\/p\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 cameras work with the SV106 50mm Guide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV106 is compatible with nearly all dedicated astronomy guide cameras. You can connect a camera using either a standard \u003cstrong\u003e1.25-inch nosepiece\u003c\/strong\u003e or by threading it directly onto the focuser's \u003cstrong\u003emale T-threads (M42x0.75)\u003c\/strong\u003e for the most secure, flex-free connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the SV106 Guide Scope to my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV106 includes tube rings and a dovetail mounting rail. This rail is designed to fit into a standard finder scope base (like those from Vixen, Synta, or Orion). Simply slide the rail into your existing finder base and tighten the screws to secure it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SV106's 190mm focal length suitable for guiding an 8\" SCT on the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it's an excellent choice for that scenario. An 8\" SCT has a long focal length, which can make finding guide stars difficult with an OAG. The SV106's wide 190mm field of view makes it easy to find a bright guide star near M42. The key is to ensure the guide scope is mounted as rigidly as possible to the main telescope to prevent differential flexure during long exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the SV106's helical focuser over a standard one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard drawtube focuser can tilt or sag as it extends, causing the guide star to shift and ruining your guiding accuracy. The \u003cstrong\u003ehelical focuser\u003c\/strong\u003e on the SV106 rotates to focus without changing its length, providing a \u003cstrong\u003ezero-flexure\u003c\/strong\u003e mechanism. This ensures that once you achieve sharp focus, your guide camera remains perfectly aligned with the guide scope's optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SV106 50mm guide scope for visual observation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. With a 1.25-inch eyepiece, the SV106 becomes a compact, fast F3.8 rich-field refractor. It's perfect for sweeping across the Milky Way or viewing large star clusters like the Pleiades (M45) and other expansive deep-sky objects from a dark site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I choose the SV106 guide scope instead of an Off-Axis Guider (OAG)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou would choose the SV106 for its ease of use. Finding a suitable guide star with its wide, independent field of view is significantly simpler and faster than hunting for one with an OAG's small pick-off prism, especially on star-poor targets. While an OAG eliminates differential flexure, the SV106 offers a much more user-friendly experience for most imaging setups.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e50mm \/ 1.97in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e190mm \/ 7.48in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003eF3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAchromatic Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Type\u003c\/td\u003e\n\u003ctd\u003eHelical Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003e1.25-inch \u0026amp; T-Threads (M42x0.75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e54.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e240mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Use\u003c\/td\u003e\n\u003ctd\u003eDeep Sky Autoguiding\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\"\u003e50mm F3.8 Guide Scope\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× 2\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 Mounting Rail\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\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":52861232644381,"sku":"SV-F9177A","price":81.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV106-Guide-Scope-50mm-with-Helical-Focuser-for-Astronomical-Telescope-1_d0abbe71-e749-4dec-a643-d3f231aba9e2.jpg?v=1788659863"},{"product_id":"svbony-sv106-60mm-f-4-guide-scope","title":"SVBONY SV106 60mm f\/4 Guide Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e60mm Aperture\u003c\/li\u003e\n\u003cli\u003e240mm Focal Length (f\/4)\u003c\/li\u003e\n\u003cli\u003ePrecise Helical Focuser\u003c\/li\u003e\n\u003cli\u003e1.25\" Camera and Eyepiece Connection\u003c\/li\u003e\n\u003cli\u003eIncludes Mounting Rings and Dovetail\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV106 60mm f\/4 Guide Scope\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV106 60mm f\/4 Guide Scope combines a 240mm focal length with fully multi-coated optics to deliver bright, sharp guide stars for precise autoguiding. Its helical focuser provides 8mm of fine adjustment travel, while the 1.25-inch connection accepts standard guide cameras and eyepieces, making it a flexible tool for capturing high-quality astrophotos.\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\u003e60mm f\/4 Optics: Brighter Guide Stars, Better Tracking\u003c\/h3\u003e\n\u003cp\u003eThe SV106 features a 60mm aperture and a fast f\/4 focal ratio, a combination that excels at gathering light. This allows your guide camera to detect fainter stars, giving you more options for locking on, especially when imaging in star-poor regions of the sky. The 240mm focal length provides a wide field of view, making it easy to find a suitable guide star without having to re-aim your main telescope.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-Coated:\u003c\/strong\u003e Ensures maximum light transmission and contrast, making guide stars pop against the background sky for a better signal-to-noise ratio in your guiding software.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Field of View:\u003c\/strong\u003e The 240mm focal length is ideal for guiding wide-field refractors and astrographs, providing a good image scale match for many popular imaging setups.\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\u003e8mm Helical Focuser: Precise, Non-Rotating Adjustments\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the SV106 is its helical focuser, which provides 8mm of precise travel for achieving critical focus. Unlike standard drawtube focusers, a helical design moves the camera in and out without rotating it. This is a critical feature for autoguiding, as it ensures your guide star remains perfectly centered on the chip while you make fine adjustments.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-Rotating Design:\u003c\/strong\u003e Keeps your guide camera's orientation fixed, so you never lose your star field alignment during focusing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Connections:\u003c\/strong\u003e The focuser collar includes male T-threads for a rigid, direct connection to guide cameras, while a 1.25-inch compression ring fitting protects your eyepieces and accessories from scratches.\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\u003eMulti-Use Design: From 240mm Guide Scope to Finder\u003c\/h3\u003e\n\u003cp\u003eThis scope is more than just a dedicated autoguider. When you're not imaging, the SV106 easily converts into a high-quality, straight-through finder scope. Simply insert a standard 1.25-inch eyepiece to get a wide, bright view of the sky, making it easy to manually locate objects. This dual-purpose functionality makes it a valuable addition to any setup, saving both space and weight.\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\u003eSV106 60mm vs. 50mm Guide Scopes: The Aperture Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile 50mm guide scopes are often smaller and lighter, the SVBONY SV106's primary advantage is its superior light-gathering capability. A 60mm objective collects 44% more light than a 50mm one, which translates directly into better guiding data.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFainter Guide Stars:\u003c\/strong\u003e The extra aperture allows your camera to see and lock onto dimmer stars, dramatically increasing your options in any given field of view.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Signal:\u003c\/strong\u003e A brighter star provides a stronger signal to your autoguider, resulting in more accurate pulse guiding corrections and ultimately, sharper long-exposure images.\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 primary advantage of the SVBONY SV106's helical focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main advantage is that it provides \u003cstrong\u003eprecise focus without rotating the attached camera\u003c\/strong\u003e or eyepiece. This is crucial for autoguiding because it means your selected guide star and the surrounding star field remain stationary on the sensor as you make fine focus adjustments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV106 to guide on faint stars near the Andromeda Galaxy (M31) with an 8-inch SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The \u003cstrong\u003e60mm aperture\u003c\/strong\u003e is a significant asset for this scenario. It gathers more light than smaller 50mm guide scopes, allowing your guide camera to detect fainter stars. This is particularly useful for finding a suitable guide star when your main telescope, like an SCT, is framed on a specific deep-sky object.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the SVBONY SV106 as a finder scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo use it as a finder, simply remove your guide camera and insert a standard \u003cstrong\u003e1.25-inch eyepiece\u003c\/strong\u003e into the helical focuser. This converts it into a straight-through optical finder, providing a wide, magnified view to help you locate objects manually.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 240mm focal length of the SV106 a good match for imaging with a wide-field 80mm refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. A short focal length guide scope like the \u003cstrong\u003e240mm SV106\u003c\/strong\u003e is an excellent match for wide-field imaging refractors. It provides a wide field of view, making it easy to find a guide star, and the image scale is appropriate for guiding telescopes with focal lengths up to around 1000mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera can I attach to the SVBONY SV106?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV106 is designed for autoguiding cameras. It offers two connection methods:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA \u003cstrong\u003e1.25-inch barrel\u003c\/strong\u003e connection with a non-marring compression ring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMale T-threads\u003c\/strong\u003e on the focuser collar for a secure, threaded connection to cameras with female T-threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the SVBONY SV106 come with everything I need to mount it?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SV106 includes a pair of \u003cstrong\u003etube rings and a dovetail rail\u003c\/strong\u003e. The dovetail bar fits into standard finder scope bases or can be bolted onto a larger dovetail plate, providing a complete mounting solution out of the box.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e60mm \/ 2.36in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e240mm \/ 9.45in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Coating\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eHelical Focuser with 8mm Travel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera\/Eyepiece Connection\u003c\/td\u003e\n\u003ctd\u003e1.25-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Material\u003c\/td\u003e\n\u003ctd\u003eAluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Diameter\u003c\/td\u003e\n\u003ctd\u003e66mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDew Shield Diameter\u003c\/td\u003e\n\u003ctd\u003e69mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e270mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Imaging Target\u003c\/td\u003e\n\u003ctd\u003eDeep sky\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\"\u003e60mm f\/4 Guide Scope\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 with Dovetail Rail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 set\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861232677149,"sku":"SV-F9177B","price":105.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV106-60mm-f-4-Guide-Scope-Multi-Use-Finder-Scope-with-Helical-Focuser-1_381bc665-9de8-4216-9cd9-8ac3bc4a4e2e.jpg?v=1788659872"},{"product_id":"svbony-sv116-adjustable-guide-scope-ring-kit-43mm-70mm","title":"SVBONY SV116 Adjustable Guide Scope Ring Kit 43mm-70mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAccommodates telescopes with 43mm to 70mm tube diameters\u003c\/li\u003e\n\u003cli\u003eLarge 12mm knurled metal adjustment screws\u003c\/li\u003e\n\u003cli\u003eSolid metal construction weighing 168.4g \/ 5.94oz\u003c\/li\u003e\n\u003cli\u003eFeatures M5 and M8 threads for versatile mounting\u003c\/li\u003e\n\u003cli\u003e70mm maximum inner diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV116 Adjustable Guide Scope Rings Kit for 43mm-70mm Telescope\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV116 Adjustable Guide Scope Rings Kit provides a rigid, adjustable mounting solution for guide scopes with tube diameters from 43mm up to 70mm. Each ring features three large 12mm knurled metal screws for precise alignment and a secure hold. With a total weight of just 168.4g (5.94oz) and standard M5 and M8 threads, this kit offers a stable, lightweight platform for autoguiding without adding significant load 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\u003eSolid Metal Build: Secure Adjustment with 12mm Knurled Screws\u003c\/h3\u003e\n\u003cp\u003eConstructed entirely from metal, the SV116 rings are built for stability and durability, eliminating flexure that can ruin a long exposure. The oversized 12mm adjustment screws are knurled for a positive grip, allowing you to make fine adjustments to your guide scope's alignment, even while wearing gloves on a cold night. The tips of these screws are inlaid with a soft Teflon material, which holds the guide scope firmly in place without scratching or marring its finish.\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\u003eFlexible Mounting: 43mm-70mm Range for Guide Scopes\u003c\/h3\u003e\n\u003cp\u003eThese rings are engineered to fit a wide variety of popular guide scopes and finders, accommodating any instrument with an outer tube diameter between 43mm and 70mm. The base of each ring is equipped with M8 threads, allowing for direct and secure attachment to most dovetail bars and mounting plates. This system enables you to mount a guide scope parallel to your main imaging telescope, a critical requirement for accurate autoguiding and astrophotography.\u003c\/p\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 guide scopes will the SVBONY SV116 rings fit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV116 rings are designed for telescopes, guide scopes, or finders with an outer tube diameter ranging from \u003cstrong\u003e43mm to 70mm\u003c\/strong\u003e. This covers most small and medium-sized guide scopes commonly used for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo the adjustment screws on the SV116 rings protect the telescope tube?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While the large \u003cstrong\u003e12mm screws\u003c\/strong\u003e are made of metal for durability, their tips feature Teflon inlays. This soft material prevents the screws from scratching or leaving pressure marks on your guide scope's finish while still providing a secure, non-slip grip.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I mount the SVBONY SV116 rings to my dovetail bar?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe base of each SV116 ring is drilled and tapped with \u003cstrong\u003eM8 threads\u003c\/strong\u003e. You can use standard M8 bolts to attach the rings directly to a universal dovetail bar or another mounting plate that has corresponding holes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV116 rings to mount a 60mm guide scope on my 11-inch SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. A 60mm guide scope falls perfectly within the \u003cstrong\u003e43mm-70mm adjustable range\u003c\/strong\u003e of the SV116 rings. Mounting them on a dovetail bar attached to your SCT will provide a stable platform for autoguiding your imaging sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do the SVBONY SV116 rings help me center a guide star for autoguiding?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe three \u003cstrong\u003e12mm knurled screws\u003c\/strong\u003e on each ring allow for fine-tune adjustments. By selectively tightening and loosening the opposing screws, you can precisely aim the guide scope independently of the main telescope. This lets you easily center a suitable guide star on your autoguider's sensor without having to move your primary imaging target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow much do the SVBONY SV116 rings weigh?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe net weight for the set is \u003cstrong\u003e168.4g (5.94oz)\u003c\/strong\u003e. Their all-metal yet lightweight design adds rigidity without significantly increasing the payload on your telescope mount.\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\u003eInner Diameter\u003c\/td\u003e\n\u003ctd\u003e70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustable Range\u003c\/td\u003e\n\u003ctd\u003e43mm - 70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment Screw Diameter\u003c\/td\u003e\n\u003ctd\u003e12mm (knurled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuide Scope Ring Threads\u003c\/td\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Plate Threads\u003c\/td\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e168.4g \/ 5.94oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861232709917,"sku":"SV-F9187A","price":28.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV116-Adjustable-Guide-Scope-Rings-Kit-for-43mm-70mm-Telescope-1_ea749b3f-9897-43e7-a8f7-de838f422a42.jpg?v=1788659881"},{"product_id":"svbony-sv165-40mm-mini-guide-scope","title":"SVBONY SV165 40mm Mini Guide Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e40mm Aperture\u003c\/li\u003e\n\u003cli\u003e160mm Focal Length (f\/4)\u003c\/li\u003e\n\u003cli\u003eAccepts 1.25\" and T2-Threaded Cameras\u003c\/li\u003e\n\u003cli\u003e12.5mm Back Focus\u003c\/li\u003e\n\u003cli\u003eWeighs 449.8g (15.87oz)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSvbony SV165 Mini Guide Scope 40mm for Deep Sky\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV165 Mini Guide Scope combines a 40mm aperture with a fast f\/4 focal ratio to deliver bright guide star images for precise autoguiding. Its 160mm focal length provides a wide field of view suitable for most imaging setups, while the fully multi-coated 2-element lens ensures high light transmission. Weighing just 449.8g and built from durable aluminum, this guide scope adds minimal weight to your mobile astrophotography rig.\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\u003eBright, Wide-Field Guiding with a 40mm f\/4 System\u003c\/h3\u003e\n\u003cp\u003eThe 40mm aperture gathers significantly more light than common 30mm guide scopes, allowing your guide camera to detect fainter stars. This expanded selection of potential guide stars is critical in star-poor regions of the sky. The fast f\/4 focal ratio keeps guide exposures short, enabling more rapid guide corrections for sharper final images.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e160mm Focal Length:\u003c\/strong\u003e Provides a wide field of view, making it easy to find a suitable guide star without having to re-point the main telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-Coated Optics:\u003c\/strong\u003e The 2-element lens design with full multi-coatings maximizes contrast and light throughput, ensuring guide stars are sharp and distinct against the background sky.\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\u003ePrecise Focusing and Solid Connections: 12.5mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eAchieving sharp focus on your guide camera is managed by the front-part focuser, which provides 15mm of travel. Once focused, the 12.5mm of back focus is compatible with many popular guide cameras that have a 1.25\" nosepiece or T2 threads.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Connection Options:\u003c\/strong\u003e Accepts standard 1.25\" nosepieces or a direct T2-thread connection for a more rigid, tilt-free imaging train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum Construction:\u003c\/strong\u003e The sandblasted aluminum body weighs only 449.8g, adding minimal flexure or strain to your primary focuser or mounting rings.\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\u003eSvbony SV165 vs. ZWO 30mm Mini Guide Scope: More Aperture for Fainter Stars\u003c\/h3\u003e\n\u003cp\u003eWhile both are excellent compact guide scopes, they serve slightly different priorities. Your choice depends on whether you prioritize absolute minimum weight or maximum light-gathering ability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZWO 30mm Mini Guide Scope Advantage:\u003c\/strong\u003e The primary advantage of the ZWO 30mm is its lower weight (approx. 250g) and more compact form factor, making it an excellent choice for the most portable star trackers or setups where every gram counts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSvbony SV165 Advantage:\u003c\/strong\u003e The SV165's 40mm aperture gathers nearly 78% more light than the 30mm ZWO. This is a decisive factor when you need to find a guide star in sparse fields or when using narrowband filters that dim starlight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal Length:\u003c\/strong\u003e The SV165's longer 160mm focal length provides a slightly higher image scale, which can improve guiding precision with cameras that have smaller pixels, assuming good seeing conditions.\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 SV165's 40mm aperture?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm aperture\u003c\/strong\u003e gathers more light than smaller 30mm guide scopes. This allows your autoguider to detect and lock onto fainter stars, giving you more options for guiding in any part of the sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Svbony SV165 to guide a wide-field refractor imaging the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The Svbony SV165's \u003cstrong\u003e160mm focal length\u003c\/strong\u003e provides a wide field of view that is an excellent match for guiding wide-field refractors. When imaging a large target like the North American Nebula, you'll have no trouble finding a suitable guide star within the guide scope's field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the Svbony SV165 Mini Guide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV165 uses a \u003cstrong\u003efront-part focuser\u003c\/strong\u003e. You achieve rough focus by sliding the front section in or out, which has \u003cstrong\u003e15mm of travel\u003c\/strong\u003e, and then lock it in place. Fine adjustments can be made by rotating the objective assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of cameras can I connect to the Svbony SV165?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe guide scope is designed for cameras with either a standard \u003cstrong\u003e1.25\" nosepiece\u003c\/strong\u003e or female \u003cstrong\u003eT2 (M42x0.75) threads\u003c\/strong\u003e. With 12.5mm of back focus, it's compatible with most compact planetary and guide cameras from brands like ZWO, QHY, or Svbony.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 160mm focal length of the SV165 suitable for guiding an 8\" f\/10 SCT on planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile it can work, a 160mm focal length is very short for guiding a telescope with a 2000mm+ focal length. For planetary imaging, where you need extremely precise guiding to resolve fine detail, a longer focal length guide scope or an \u003cstrong\u003eoff-axis guider (OAG)\u003c\/strong\u003e is generally recommended to achieve a better image scale match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the 449.8g weight of the Svbony SV165 pose a problem for small mounts?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWeighing just under one pound (\u003cstrong\u003e449.8g\u003c\/strong\u003e), the SV165 is very lightweight. However, it is heavier than ultra-compact 30mm guide scopes. For small star trackers or mounts operating near their payload limit, you should account for this weight plus the weight of your guide camera to ensure stable tracking.\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\u003e40 mm \/ 1.57 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e160 mm \/ 6.30 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Design\u003c\/td\u003e\n\u003ctd\u003e2-Element, Fully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Type\u003c\/td\u003e\n\u003ctd\u003eFront Part Focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Travel\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e12.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" \u0026amp; T2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Finish\u003c\/td\u003e\n\u003ctd\u003eSandblasting oxidation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e449.8g \/ 15.87oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Size\u003c\/td\u003e\n\u003ctd\u003e179x114x59mm \/ 7.05x4.49x2.32 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861232742685,"sku":"SV-W9125B","price":83.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV165-Mini-Guide-Scope-40mm-for-Deep-Sky-1_b831f0f7-4331-4dc4-8c1b-a10f8f06cf56.jpg?v=1788883397"},{"product_id":"svbony-sv198-50mm-mini-guide-scope","title":"SVBONY SV198 50mm Mini Guide Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50mm Aperture\u003c\/li\u003e\n\u003cli\u003e206.6mm Focal Length (f\/4.1)\u003c\/li\u003e\n\u003cli\u003eDual Helical Focuser with 12mm Travel\u003c\/li\u003e\n\u003cli\u003e1.25\" and T2 Thread Connections\u003c\/li\u003e\n\u003cli\u003eIncludes 45mm T2 Extension Tube\u003c\/li\u003e\n\u003cli\u003eVixen-Style Mounting Base\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSvbony SV198 50mm Mini Guide Scope Finder\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV198 guide scope combines a bright 50mm f\/4.1 optical system with a precise dual helical focuser to deliver reliable, accurate autoguiding for long-exposure astrophotography. Its 206.6mm focal length provides an ideal image scale for guiding long-focal-length telescopes, while the entire aluminum package weighs just 557g. The focuser offers 12mm of fine adjustment, ensuring your guide camera achieves critical focus without rotation or flexure.\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\u003e50mm f\/4.1 Optics: Brighter Guide Stars, Better Tracking\u003c\/h3\u003e\n\u003cp\u003eThe SV198's 50mm aperture gathers significantly more light than smaller 30mm guide scopes, allowing your guide camera to detect fainter stars in any given field of view. This is a critical advantage when imaging in light-polluted skies or targeting areas of the sky with few bright stars. The 2-element achromat lens is fully multi-coated with blackened lens edges to maximize contrast, ensuring your software locks onto sharp, high-contrast stars for sub-pixel guiding accuracy.\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\u003eDual Helical Focuser: 12mm of Precise, No-Flex Focus Travel\u003c\/h3\u003e\n\u003cp\u003eAchieving and holding perfect focus is non-negotiable for autoguiding. The SV198 features a dual-action focuser that combines a sliding drawtube for coarse adjustment with a fine-threaded helical focuser for the final, critical turn. This design provides 12mm of precise focusing stroke and, unlike simple drawtube focusers, does not rotate the attached camera, preserving your guide star calibration. The result is a rigid, repeatable focus that won't shift during an imaging session.\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\u003eFlexible Back Focus: Adapting for Cameras and Eyepieces\u003c\/h3\u003e\n\u003cp\u003eThe SV198 is engineered for adaptability right out of the box. It includes a 45mm T2-extension tube that provides the correct spacing to bring most modern guide cameras to focus. For visual use as a finder scope, simply remove the extension tube to achieve focus with standard 1.25\" eyepieces. This dual-purpose functionality makes it a valuable tool for both imaging and visual setups.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuide Camera Use:\u003c\/strong\u003e Install the included 45mm T2 extension tube to reach focus with popular guide cameras that have short back-focus requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEyepiece Use:\u003c\/strong\u003e Remove the extension tube to use the SV198 as a high-quality 50mm finder scope with your favorite 1.25\" eyepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Mounting:\u003c\/strong\u003e The integrated bracket features a Vixen-standard dovetail bar for direct attachment to most telescope saddles and adapters.\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\u003eSV198 50mm vs. 30mm Guide Scopes: Why Aperture Matters\u003c\/h3\u003e\n\u003cp\u003eWhile smaller guide scopes are lighter, the SV198's 50mm aperture offers a distinct advantage in light-gathering power. This translates directly to a greater selection of usable guide stars, which is crucial for the success of your autoguiding. More available stars mean your software can use multi-star guiding for higher accuracy and is less likely to lose its lock if a single star is momentarily obscured by clouds.\u003c\/p\u003e\n\u003cp\u003eThe trade-off for this capability is a modest increase in weight to 557g. However, for imagers using Schmidt-Cassegrains, Ritchey-Chrétiens, or refractors over 1000mm in focal length, the improved guiding reliability from a brighter guide scope far outweighs the added mass.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SV198 help when guiding a long focal length SCT on a faint galaxy like the Pinwheel Galaxy (M101)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a target like M101, which is in a star field that can be sparse, the \u003cstrong\u003e50mm aperture\u003c\/strong\u003e of the SV198 is a major asset. It pulls in fainter stars than a smaller guide scope, giving your guiding software more options to lock onto. This ensures consistent, accurate tracking throughout a long imaging session required for faint galaxies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Svbony SV198 as a finder scope with an eyepiece on my 8\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. By removing the included \u003cstrong\u003e45mm T2-extension tube\u003c\/strong\u003e, the SV198 is configured to reach focus with standard 1.25\" eyepieces. Its 206.6mm focal length will give you a wide field of view, making it an excellent optical finder. You would just need a Vixen-style saddle on your telescope to mount it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I achieve focus with the SV198 using a guide camera versus an eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV198 is designed for both. For most guide cameras, you will need to install the included \u003cstrong\u003e45mm T2-extension tube\u003c\/strong\u003e between the focuser and the camera. For use with a 1.25\" eyepiece, you must remove the extension tube.\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 SV198's helical focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA helical focuser provides fine, precise focus adjustments without rotating the attached camera. This is critical for autoguiding, as it prevents you from having to recalibrate your guide software every time you touch the focus. It is a much more stable and accurate method than a simple push-pull or single-knob drawtube focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescopes can I mount the Svbony SV198 to?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV198 comes with a mounting bracket that has a \u003cstrong\u003eVixen-standard dovetail foot\u003c\/strong\u003e. This will fit into any Vixen-style saddle, which is a common standard on many telescope rings, handles, and dedicated mounting platforms.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAt 557g, is the SV198 too heavy for my portable setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the SV198 is heavier than ultra-light 30mm guide scopes, its \u003cstrong\u003e557g (1.23 lbs)\u003c\/strong\u003e weight is still very manageable for most portable mounts rated for astrophotography (e.g., Sky-Watcher Star Adventurer GTI, iOptron SkyGuider Pro). The significant improvement in guiding from the 50mm aperture is often worth the modest weight increase for achieving sharp, long exposures.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e50mm \/ 1.97in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e206.6mm \/ 8.13in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics Type\u003c\/td\u003e\n\u003ctd\u003eAchromat Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Structure\u003c\/td\u003e\n\u003ctd\u003e2-Elements \/ 1 Group\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Coating\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlackened Lens Edges\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eDual Helical + Telescopic Design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocusing Stroke\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera\/Eyepiece Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" and T2 Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Base\u003c\/td\u003e\n\u003ctd\u003eVixen standard interface\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\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e557g\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\"\u003eSV198 50mm f\/4.1 mini Guide Scope\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 Bracket with Vixen-style foot\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\"\u003e45mm T2-Extension Tube\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 Plug\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\"\u003eSilicone Objective 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\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSvbony 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861232840989,"sku":"SV-W9155A","price":150.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV198-50mm-Mini-Guide-Scope-Finder-with-Dual-Helical-Focuser-1_dbacade0-639a-4989-8530-ccb3d5cd9625.jpg?v=1788659903"},{"product_id":"svbony-sv165-30mm-f-4-mini-guide-scope","title":"SVBONY SV165 30mm f\/4 Mini Guide Scope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e30mm Aperture\u003c\/li\u003e\n\u003cli\u003e120mm Focal Length (f\/4)\u003c\/li\u003e\n\u003cli\u003e45mm Focuser Tube Travel\u003c\/li\u003e\n\u003cli\u003e26mm Back Focus\u003c\/li\u003e\n\u003cli\u003eIncludes Mounting Bracket with Dovetail\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSVBONY SV165 30mm f\/4 Mini Guide Scope\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV165 Mini Guide Scope provides precise autoguiding in a compact package, combining a 30mm aperture with a 120mm focal length for a fast f\/4 optical system. With 45mm of tube travel for focusing and 26mm of available back focus, it accommodates a wide range of popular guide cameras. The entire system is built from lightweight aluminum and includes a versatile UNC 1\/4-20 mounting point and a dedicated dovetail bracket, ensuring it adds tracking accuracy without burdening 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\u003eCompact 30mm f\/4 Optics for Accurate Guiding\u003c\/h3\u003e\n\u003cp\u003eThe SV165's optical design is purpose-built for modern autoguiding. The 30mm objective gathers enough light to reveal plenty of guide stars in most fields, while the short 120mm focal length creates a wide field of view. This makes finding a suitable guide star simple and is an excellent match for imaging with wide-field refractors and camera lenses up to medium focal lengths.\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 Focuser Travel in a Lightweight Aluminum Body\u003c\/h3\u003e\n\u003cp\u003eAchieving sharp focus on your guide star is critical, and the SV165 simplifies the process with a smooth helical focuser providing 45mm of travel. This range is sufficient to bring most 1.25\" barrel guide cameras to a sharp focus. Once focused, two nylon-tipped thumbscrews lock the position without marring the barrel, and the all-aluminum construction ensures mechanical stability and minimal weight.\u003c\/p\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 SV165 Mini Guide Scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary advantage is its extremely low weight and compact size. The SVBONY SV165 provides accurate guiding for portable and lightweight imaging setups without adding significant mass, which can strain smaller equatorial mounts and affect tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of guide cameras work best with the SV165 30mm guide scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV165 is ideal for small-format, sensitive CMOS guide cameras with 1.25\" nosepieces. Its \u003cstrong\u003e26mm of back focus\u003c\/strong\u003e and \u003cstrong\u003e45mm of tube travel\u003c\/strong\u003e are well-suited for cameras like the ZWO ASI120MM Mini, ASI290MM Mini, or similar models that are lightweight and do not require extensive back focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SV165 perform with a wide-field refractor imaging the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV165 is an excellent match for this scenario. Its \u003cstrong\u003e120mm focal length\u003c\/strong\u003e provides a guiding image scale that is appropriate for wide-field systems (typically 250mm-600mm). It will deliver precise tracking corrections necessary for capturing sharp stars and faint detail in large targets like the North American Nebula (NGC 7000) or the Andromeda Galaxy (M31).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the SVBONY SV165 guide scope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV165 uses a helical-style focuser. You rotate the main barrel to move the guide camera in and out to achieve focus. Once your guide star is sharp, you tighten the two nylon-tipped thumbscrews on the mounting bracket to lock the focuser in place, preventing any slippage during your imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SV165 30mm guide scope suitable for a larger 10-inch SCT imaging the Whirlpool Galaxy (M51)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor long focal length instruments like a 10-inch f\/10 SCT (around 2500mm), the SVBONY SV165's short \u003cstrong\u003e120mm focal length\u003c\/strong\u003e can be a limitation. The large difference in image scale between the imaging scope and guide scope can lead to \"pixel chasing\" and less accurate guiding. For such long focal lengths, an Off-Axis Guider (OAG) or a guidescope with a longer focal length is generally recommended for optimal results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the SVBONY SV165 to my main telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV165 comes with a versatile mounting bracket. The base of the bracket is a small dovetail bar that fits into standard Vixen-style or Synta-style finder shoes on most telescopes. The bracket also features a central \u003cstrong\u003eUNC 1\/4-20\u003c\/strong\u003e threaded hole for direct attachment to telescope tube rings or mounting plates.\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\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e120mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser Tube Travel\u003c\/td\u003e\n\u003ctd\u003e45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e26mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Interface\u003c\/td\u003e\n\u003ctd\u003eUNC 1\/4-20 Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Mount\u003c\/td\u003e\n\u003ctd\u003eYes, Two-Ring Bracket with Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Finish\u003c\/td\u003e\n\u003ctd\u003eSandblasted Oxidation\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\"\u003e30mm f\/4 Mini Guide Scope\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\"\u003eTwo-Ring Bracket with Dovetail\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\"\u003eNylon-Tipped Thumbscrews\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\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\"\u003eScrews Tool\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\"\u003eDust 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\"\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\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861232972061,"sku":"SV-W9125A","price":63.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV165-30mm-F4-Mini-Guide-Scope-for-Astrophotography-1_c943dd81-91e0-4268-8812-08f900711f55.jpg?v=1788883376"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/svbony-off-axis-guiders-and-guide-scopes.oembed","provider":"David Astro","version":"1.0","type":"link"}