{"product_id":"svbony-sv198-mini-50mm-guiding-scope-with-dual-helical-focuser-w9155a","title":"SVBONY SV198 Mini 50mm Guiding Scope with Dual Helical Focuser (W9155A)","description":"\u003ch1\u003eSVBONY SV198 Mini 50mm Guiding Scope with Dual Helical Focuser\u003c\/h1\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e50mm aperture; SV198 is convenient for astronomers to find a target in the sky; a large diameter can obtain a good view;\u003c\/li\u003e\n\u003cli\u003ePosition clamp screw; easy to adjust the guide scope and astronomical tube; especially important for entry level astronomy enthusiasts;\u003c\/li\u003e\n\u003cli\u003eOptical glass; multi layer broadband anti reflection coating double glue lens; well made edge coating;\u003c\/li\u003e\n\u003cli\u003ePrecise helical focusing with a millimeter scale and 12mm focal path; \u003c\/li\u003e\n\u003cli\u003eOne scope for multiple purposes; can be used as a guide star and star finder; \u003c\/li\u003e\n\u003cli\u003e45mm T2-Extension Tube Male thread M42*0.75; Female thread M42*0.75; eliminates a range of focusing problems;Tube rings with Vixen compatible dovetail.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_85eff20e-94ba-4134-9f7c-9ad48d4bbdee.jpg?v=1759172687\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 50mm aperture in SV198 guide scope significantly enhances their performance by improving light-gathering capability, resolution, contrast, and overall usability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_ac289087-6df9-44c0-9ff9-665efc3347c2.jpg?v=1759172708\u0026amp;width=700\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA 1.25\" eyepiece holder with T2 thread enhances the flexibility and usability of SV198 guide scope by providing standardized compatibility, improved light paths, and secure connections for various accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/3_e52ddeb3-6a26-4999-aa48-d8b415040ca8.jpg?v=1759172708\u0026amp;width=700\"\u003e\u003c\/span\u003e\u003cspan\u003eGuide scope with fine focusing enhances the overall effectiveness and accuracy of astronomical observations by providing clearer images, accurate targeting, and improved optical quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4_60b8dc1f-e842-4211-a0e5-8e8b0374968c.jpg?v=1759172708\u0026amp;width=700\"\u003e\u003c\/span\u003e\u003cspan\u003eFeaturing a 45mm extension, SV198 can work with insert guide cameras, such as SVbony SV905C, SV305 and etc. The compatibility enhances the focusing range,  reduces vignetting, and provides convenience for astrophotography. Without an extension tube, the SV198 guide scope is compatible with standard 1.25inch eyepieces, meeting your various observation needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/5_127836e7-95b2-4794-a74e-1ca0a957fa65.jpg?v=1759172708\u0026amp;width=700\"\u003e\u003c\/span\u003e\u003cspan\u003eWithout an extension tube, the SV198 guide scope is compatible with standard 1.25inch eyepieces, meeting various observation needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6_adb4a1b3-7498-4812-8e09-24804f0e903d.jpg?v=1759172708\u0026amp;width=700\"\u003e\u003c\/span\u003e\u003cspan\u003eThe design enhances observational performance by reducing reflective interference, improving image contrast, and lowering optical noise.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/7_24e713d4-6892-4f25-bc23-9c3f09751fc2.jpg?v=1759172708\u0026amp;width=700\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eFeature\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1. The SV98 50mm small telescope is primarily intended as a guide scope for autoguiding. But it can also be used as a viewfinder or mini telescope.\u003c\/li\u003e\n\u003cli\u003e2. Focusing is done using a precise helical focuser with a millimeter scale and 12mm focus path.\u003c\/li\u003e\n\u003cli\u003e3. 1.25\" eyepiece holder with T2 thread.\u003c\/li\u003e\n\u003cli\u003e4. Position clamp screw.\u003c\/li\u003e\n\u003cli\u003e5. Tube rings with Vixen compatible dovetail.\u003c\/li\u003e\n\u003cli\u003e6. The 45mm T2-Extension Tube Male thread M42*0.75; Female thread M42*0.75; eliminates a range of focusing problems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"margin-left: auto; margin-right: auto;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eSV198\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eType of Optics\u003c\/td\u003e\n\u003ctd\u003eAchromat Refractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eLens Structure\u003c\/td\u003e\n\u003ctd\u003e2-Elements\/ 1Groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eTube material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e50mm \/ 1.97in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eFocal ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e206.6mm \/ 8.13in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eBlackened Lens Edges\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eDual Helical + Telescopic Design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eDual Helical Focuser Focusing stroke\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eFocusing seat accuracy (Dual Helical Focusing)\u003c\/td\u003e\n\u003ctd\u003e0.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eRough Focusing stroke\u003c\/td\u003e\n\u003ctd\u003e38mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eFocusing seat accuracy (Rough Focusing)\u003c\/td\u003e\n\u003ctd\u003e1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eConnection thread to Eyepiece\u003c\/td\u003e\n\u003ctd\u003e1.25\" and T2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eBase installation type\u003c\/td\u003e\n\u003ctd\u003eVixen standard interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eTube diameter\u003c\/td\u003e\n\u003ctd\u003e55.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eDew cap diameter\u003c\/td\u003e\n\u003ctd\u003e58mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e234mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"text-align: center;\"\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e577g \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e \u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSV198 50mm f\/4.1 mini Guide Scope\u003c\/li\u003e\n\u003cli\u003eBracket with a dovetail\u003c\/li\u003e\n\u003cli\u003e3PCS Nylon-tipped thumbscrews\u003c\/li\u003e\n\u003cli\u003e45mm T2-Extension Tube\u003c\/li\u003e\n\u003cli\u003e1.25\" Dust Plug\u003c\/li\u003e\n\u003cli\u003eLens Dust Cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eSvbony 1-Year Warranty \u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":57204018446502,"sku":"qxb1787937494318","price":72.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/2215\/4918\/files\/svbony-sv198-mini-50mm-guiding-scope-with-dual-helical-focuser-w9155a_1.webp?v=1787937499","url":"https:\/\/www.marbleandmoss.shop\/products\/svbony-sv198-mini-50mm-guiding-scope-with-dual-helical-focuser-w9155a","provider":"My Store","version":"1.0","type":"link"}