{"title":"Buckeyestargazer Focus \u0026 Collimation Masks","description":"\u003cp\u003eTriBahtinov, isolation, Bahtinov and Duncan masks for telescope focusing and collimation.\u003c\/p\u003e","products":[{"product_id":"buckeyestargazer-tribahtinov-mask-for-telescope-focus-collimation","title":"Buckeyestargazer TriBahtinov Mask for Telescope Focus \u0026 Collimation","description":"\u003cp\u003eThe Buckeyestargazer TriBahtinov Mask combines the proven focusing precision of a traditional Bahtinov mask with the added ability to assess and fine-tune collimation on telescopes with adjustable optics.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/TriBahtinov-C8_2_2153516a-f3c9-4eef-9f7b-3076f4f444a0.webp?v=1775203555\" alt=\"BuckeyeStargazer TriBahtinov Mask for Collimation and Focus filter on a white background\"\u003e\u003c\/p\u003e\n\u003cp\u003eUsing a three-zone diffraction design, the TriBahtinov pattern allows astrophotographers to achieve highly accurate focus while also identifying optical alignment errors, making it particularly valuable for SCT, RC, Maksutov, and other collimatable telescope systems.\u003c\/p\u003e\n\u003cp\u003eEach mask features a raised central grip for easy handling in the dark and is supplied in precision snap-fit sections for simple assembly, transport, and storage. Smaller sizes may be single-piece, while larger aperture versions use multiple keyed segments that securely connect together.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHyperstar \/ Fastar compatibility:\u003c\/strong\u003e Selected C6, C8, C9.25, C11 and C14 variants are designed to support both Hyperstar and native Fastar secondary mirror configurations. These versions include a correctly sized central opening plus a snap-fit reducer bushing where required.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/TriBahtinov-C8_1_ccd6e3c1-f690-4c2b-86f9-8985acf5bd63.webp?v=1775203693\" alt=\"BuckeyeStargazer TriBahtinov Mask for Collimation and Focus with slotted design on a white background\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembly guidance:\u003c\/strong\u003e The keyed segment connectors are designed to fit in one direction only. Always align the tabs carefully and press sections together gently without forcing from the wrong angle.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDual-purpose focus and collimation tool\u003c\/li\u003e\n\u003cli\u003eIdeal for SCT, RC, Maksutov and refractor systems\u003c\/li\u003e\n\u003cli\u003eHyperstar \/ Fastar compatible options available\u003c\/li\u003e\n\u003cli\u003eSnap-fit sectional design for easy storage\u003c\/li\u003e\n\u003cli\u003eRaised centre grip for dark-sky handling\u003c\/li\u003e\n\u003cli\u003eMultiple telescope-specific variants available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/TriBahtinov_2_a051ece3-8de2-4692-8848-323a4ec93f40.webp?v=1775203693\" alt=\"Diagram of a BuckeyeStargazer TriBahtinov Mask for Collimation and Focus with labeled features on a white background\"\u003e\u003c\/p\u003e","brand":"Buckeyestargazer","offers":[{"title":"Tribahtinov-C5-Hole dia. 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