{"product_id":"askar-50p-lightweight-professional-astronomical-50mm-aperture-f-3-8-telescope-quadruplet-petzval-apo-structure","title":"Askar 50P Lightweight Professional Astronomical 50MM Aperture F\/3.8 Telescope Quadruplet Petzval APO Structure","description":"\u003cp\u003e\u003cb\u003eDescription:\u003c\/b\u003e\u003cbr\u003e- The 50P is a compact OTA that combines a 50mm aperture, 190mm focal length, and a fast f\/3.8 focal ratio into a lightweight, portable form -- delivering professional optical performance in a minimal footprint.\u003cbr\u003e- Its optical system employs a quadruplet Petzval APO design, featuring one SD glass element. The rear two elements are cemented,supporting APS-C format and optimized for 1-inch sensors. Thanks to the self-flattened design, no additional correctors are required: attach your camera, achieve focus, and begin capturing flat-field images.\u003cbr\u003e- The lens tube is built as a single lightweight unit. The lens hood adopts a design: extended during use to block stray light effectively, and reversed when stored to minimize overall length. Combined with the dust cover, it offers both convenience and protection.\u003cbr\u003e- Dual finder bases are integrated on both sides of the tube ring, and multiple standard M4 threaded holes are reserved, offering ample potential for expanding with astronomical accessories.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecification:\u003c\/b\u003e\u003cbr\u003e- Aperture: 50mm\u003cbr\u003e- Focal length: 190mm\u003cbr\u003e- Focal ratio: F3.8\u003cbr\u003e- Objective lens type: 4-piece Petzval APO (including one SD glass)\u003cbr\u003e- Total length: 147mm (retracted state of light shield); 182mm (extended state of light shield)\u003cbr\u003e- Format specifications: supports APS-C format, optimized for 1-inch format\u003cbr\u003e- Total weight (including clamps and dovetail): 1.4KG\u003cbr\u003e- End interface: M48 interface (including 2-inch filter thread)\u003cbr\u003e- End connection distance: supports a range of 50-65mm (recommended connection length is 55mm)\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Included:\u003c\/b\u003e\u003cbr\u003e- 1 x Telescope\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-01.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-02.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-03.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-04.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-05.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-06.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-07.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-08.jpg\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg style=\"width: 1000px;\" src=\"https:\/\/www.comseek.com\/image\/catalog\/101741\/101741-09.jpg\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":41029006458929,"sku":"101741","price":338.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/4790\/6353\/files\/1778117077-3.jpg?v=1780377345","url":"https:\/\/www.thanksbuyer.com\/products\/askar-50p-lightweight-professional-astronomical-50mm-aperture-f-3-8-telescope-quadruplet-petzval-apo-structure","provider":"Thanksbuyer Online,SDR Radio, Testers and Measurement devices, Astronomy products,  Audio Amplifer and Decoders","version":"1.0","type":"link"}