{"product_id":"touptek-gs-250ac-50mm-aperture-papo-f-5-high-precision-astronomical-guide-scope-with-fsb-125c-rackless-focuser","title":"ToupTek GS-250AC 50mm Aperture PAPO f\/5 High Precision Astronomical Guide Scope with FSB-125C Rackless Focuser","description":"\u003cp\u003e\u003cb\u003eToupTek GS-250AC 50mm Aperture PAPO f\/5 High Precision Astronomical Guide Scope with FSB-125C Rackless Focuser\u003cbr\u003e\u003cbr\u003eDifference:\u003c\/b\u003e\u003cbr\u003e- Rackless Focuser (AC versions): FSB-125C rackless focuser with precision bearing guides and a classic Crayford-style mechanism for smooth focusing and stable optical alignment—ideal for light-load manual imaging.\u003cbr\u003e- Rack-and-Pinion Focuser (AR versions): FSB-125R gear-driven focuser with precision bearing guides for higher focusing accuracy; compatible with ToupTek Astro AAF electronic focuser, suitable for autofocus and heavier payloads.\u003cbr\u003e\u003cb\u003e\u003cbr\u003ePAPO Apochromatic Optical Design, True Star-Color Reproduction:\u003c\/b\u003e\u003cbr\u003e- The GS Series guide scopes feature a proprietary three-element PAPO (planar apochromat with integrated field flattener) configuration with one ED element, effectively correcting chromatic aberration, astigmatism, and field curvature. Designed around a flat, well-corrected 1-inch image circle, they deliver crisp, pinpoint star images for accurate guiding, while also supporting visual use and entry-level night-sky\/DSO imaging.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eHigh-Transmission Coatings + Anti-Reflection Threads, Boost Guiding Sensitivity:\u003c\/b\u003e\u003cbr\u003e- All optical surfaces use broadband multi-layer AR coatings to minimize reflections and maximize transmission. The internal barrel is precision-machined with anti-reflection threads and additional stray-light suppression, greatly improving image contrast.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eCNC Precision Machining, Fine Matte Finish:\u003c\/b\u003e\u003cbr\u003e- The tube, rings, and dovetail plate are CNC-machined from aluminum alloy for a balance of low weight and structural strength. Anodized surfaces provide wear and corrosion resistance suited to field astronomy. The fine matte texture is comfortable, durable, and non-slip.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eModular Structure for Maximum Flexibility:\u003c\/b\u003e\u003cbr\u003e- A proprietary universal M48 extension tube with anti-reflection treatment forms the main barrel, allowing flexible combinations to match optical path requirements - from visual observing to astrophotography.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eWide Compatibility · Rich Configurations, Seamless System Integration:\u003c\/b\u003e\u003cbr\u003e- Built for flexibility: support for 1-inch sensors, direct threaded connections, and multiple mounting points let the GS Series integrate smoothly with a wide range of cameras and setups.\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Included:\u003c\/b\u003e\u003cbr\u003e- 1 x Guide Scope\u003cbr\u003e- 1 x Dust Cover\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cfont color=\"#ff0000\"\u003eNote:\u003cbr\u003e- The GS-350 guide scope displayed in the picture is out of stock, for demonstration only.\u003c\/font\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-01.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-02.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-03.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-04.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-05.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-06.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-07.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-08.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-09.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 750px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/99187\/99187-10.jpg\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products, Audio Amplifer and Decoders","offers":[{"title":"Default Title","offer_id":41028719444017,"sku":"99188","price":143.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/4790\/6353\/files\/1760578867-1.jpg?v=1780324272","url":"https:\/\/www.thanksbuyer.com\/ru\/products\/touptek-gs-250ac-50mm-aperture-papo-f-5-high-precision-astronomical-guide-scope-with-fsb-125c-rackless-focuser","provider":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products,  Audio Amplifer and Decoders","version":"1.0","type":"link"}