{"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\/fr\/products\/svbony-sv165-30mm-f-4-mini-guide-scope","provider":"David Astro","version":"1.0","type":"link"}