{"product_id":"zwo-ff131-apo","title":"ZWO FF131-APO","description":"\u003cp class=\"p1\"\u003eZWO FF131 APO\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFlat-Field Apochromatic Refractor\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Principal_KV_cb603ba3-f5e0-42c5-a174-1bb977f861e7.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e*Focus can be achieved within a back focus range of 42–73 mm, measured from the M54–M48 interface shoulder.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eMain Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Highlights_e2b1bb14-8d89-437e-89ad-5e55235671e0.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/icon_89475b09-f2c2-44c8-b1b3-4122f2cbc917.jpg?v=1780683608\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eFlexible Connectivity for Multiple Configurations\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Scene_10803dd2-f96a-4470-baef-7ce6fa2eaa9f.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eUniqueness\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003eFour-Element Optical Design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eThe FF131 APO features a four-element, fully air-spaced apochromatic optical design. All four elements work together to deliver a flat imaging field without the need for an additional field flattener.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eOne ED (extra-low dispersion) glass element is incorporated to effectively reduce chromatic aberration, resulting in improved color correction and image clarity.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Four-Element_Optical_Design_21a2a559-69ff-46dc-a41c-586d1b647467.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003e\u003cb\u003e44 mm Image Circle — Full-Frame Support\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eWith a 44 mm image circle, the FF131 APO fully supports full-frame sensors and a wide range of imaging setups.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eIt delivers sharp star fields with excellent edge-to-edge performance, ensuring consistent image quality across the entire frame.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Support_full-frame.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li4\"\u003eNative Flat-Field Design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p4\"\u003eThe FF131 APO features a native flat-field optical design, eliminating the need for an additional field flattener.\u003c\/p\u003e\n\u003cp class=\"p4\"\u003eNo complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eConvenient Design\u003c\/b\u003e\u003c\/p\u003e\n\u003cul class=\"ul1\"\u003e\n\u003cli class=\"li1\"\u003eCoarse \u0026amp; fine focus adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003eEquipped with a rigid 3-inch rack-and-pinion focuser, the FF131 APO offers precise control with a 1:10 coarse \u0026amp; fine focus adjustment mechanism.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eA built-in 360° rotator at the rear allows for smooth and accurate camera angle adjustments.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Focus_b175586f-900e-4af6-bea0-7908f85be24d.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Focus_adjustment_e682d3ee-2ff4-4524-8212-e8c3a5b48dbb.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e5. Retractable Dew Shield\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe FF131 APO features a retractable dew shield, reducing overall length for improved portability.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003ePrecision CNC machining and a high-quality painted finish, combined with an internal anti-reflection coating, help minimize stray light and enhance image contrast.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e6. Quick-Release Mounting Rings\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe mounting rings are detachable, allowing for quick and easy setup or teardown of the telescope.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Clamp_f6ca95bb-28f8-45cb-81d7-9d78b584adba.jpg?v=1780683608\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003ePhotography Extension Tube\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eThe FF131 APO is designed for seamless integration with modern imaging systems, and includes a standard four-section photographic extension tube with a 2-inch filter thread. Rear adapters in both M48x0.75 and M54x0.75 formats are also included, making it easy to connect a wide range of cameras, filters, and astrophotography accessories for a clean, flexible setup right out of the box.\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Extended_Photography.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003ePerformance\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eOptical Layout\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Optical_path_diagram_2d50925c-bc1c-4161-b81a-d52158c670c9.jpg?v=1780683608\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eStar Field Map\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Bitmap_image_3dd08d9b-2c0c-4ef8-8c18-02e93a069cfb.jpg?v=1780683608\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003eProduct Diagram\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Product_structure_size.jpg?v=1780683609\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Product_size_d954fcbb-83ba-48da-949c-59792ee54c9e.jpg?v=1780683608\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p3\"\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Product_parameters_141deddd-bd50-44c4-8f60-8e3dd605bdd9.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p5\"\u003e\u003cb\u003eWhat's in the box?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Packaging_List_5f99b674-b078-45ef-bd8c-3bbc643c9325.jpg?v=1780683608\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFF Series Telescope Comparison\u003c\/p\u003e\n\u003cp class=\"p2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/Comparison_Table_31693ae4-afbd-41b7-bff3-80cab28db1e3.jpg?v=1780683609\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p6\"\u003e \u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":48489073213689,"sku":"ZWO FF131-APO","price":1999.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/3_21ddeb21-2a29-464d-ad67-88d14f0eff0b.jpg?v=1780684000","url":"https:\/\/cloudbreakoptics.com\/products\/zwo-ff131-apo","provider":"Cloud Break Optics","version":"1.0","type":"link"}