{"product_id":"baader-hyperion-finetuning-ring-m48-28-mm-2958228","title":"Baader Hyperion Finetuning-Ring M48, 28 mm (HDFT-28)","description":"\u003ch2\u003e\u003cspan\u003eBaader Hyperion Finetuning-Ring M48, 28 mm\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eWith the addition of Baader's new Finetuning Rings, each Hyperion eyepiece can now function as four eyepieces! Available in 14mm and 28mm lengths. The finetuning rings are 2\" OD and threaded M48 (filter thread) on each end, so they can be installed in-between the Hyperion's removable front negative element and main body. The added spacing decreases the focal lengths (increases magnification), according to the table below. Finetuning rings are made to match the Hyperion finish, and are fully internally sharp v-threaded and blackened to eliminate stray light reflections from the internal surfaces.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eAlso, another novel way to change eyepiece focal length is to use a Baader 2\" Filter in-between the Hyperion negative element and main body, just like a small finetuning ring. The 8.5mm thickness of the filter cell will have a similar (milder) effect in reducing the Hyperion's focal length. This also allows use of 2\" filters with Hyperions, something that is not possible with any other 1¼\" Eyepiece.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cem\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRemoval and installation of the front negative element should be done in a clean environment to prevent dust or other contamination from depositing on the internal elements (which are very difficult to clean). Also, please note that the 24mm Hyperion is not able to make use of the Finetuning Rings, due to its different optical design.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"94%\" cellspacing=\"0\" cellpadding=\"0\" border=\"2\" bordercolor=\"#111111\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e\u003cb\u003eHyperion\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e\u003cb\u003ew\/ 14mm Ring\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e\u003cb\u003e28mm Ring\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e\u003cb\u003e14 + 28 Ring\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e\n\u003cp\u003e\u003cb\u003ew\/ Baader\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2\" Filter\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e21mm\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e17.6\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e15.5\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e14.0\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e18.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e17mm\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e13.1\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e10.8\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e9.2\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e14.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e13mm\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e10.8\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e9.2\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e8.1\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e11.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e10mm\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e8.4\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e7.1\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e6.1\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e9.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e8mm\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e6.0\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e5.0\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e4.3\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e6.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e5mm\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e4.0\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e3.2\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e2.6\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e4.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e3.5mm\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e2.5\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e2.1\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e1.8\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"20%\"\u003e2.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003cb\u003eHyperion Focal Lengths with Finetuning Rings\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003ctable width=\"458\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"229\"\u003eMANUFACTURER\u003c\/td\u003e\n\u003ctd width=\"229\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU (#)\u003c\/td\u003e\n\u003ctd\u003e2958228\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN CODE\u003c\/td\u003e\n\u003ctd\u003e4.04783E+12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWEIGHT (NETTO)\u003c\/td\u003e\n\u003ctd\u003e0.052\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOPTICAL LENGTH (MM)\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eINNER DIAMETER \/ CLEAR APERTURE (MM)\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUTER DIAMETER\u003c\/td\u003e\n\u003ctd\u003e2\" (50,8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eINNER CONNECTION (LENS SIDED)\u003c\/td\u003e\n\u003ctd\u003eThread, M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUTER CONNECTION (LENS SIDED)\u003c\/td\u003e\n\u003ctd\u003eBarrel, 2\" (50,8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eINNER CONNECTION (EYEPIECE\/-CAMERA-SIDED)\u003c\/td\u003e\n\u003ctd\u003eBarrel, 2\" (50,8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUTER CONNECTION (EYEPIECE\/-CAMERA-SIDED)\u003c\/td\u003e\n\u003ctd\u003eThread, M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eADAPTABLE TO\u003c\/td\u003e\n\u003ctd\u003eNot suitable for Morpheus® 76° eyepieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOMPATIBLE BRANDS\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTYPE OF ADAPTER\u003c\/td\u003e\n\u003ctd\u003eExtension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBaader Hyperion Finetuning-Ring M48, 28 mm (2958228)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2-Year Warranty\u003c\/p\u003e\n\u003cp align=\"center\" style=\"text-align: left;\"\u003e\u003ca title=\"Hyperion eyepieces application examples\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/1172\/0013\/files\/hyperion_eyepieces_application_examples_24f65190-6d56-4b34-8ed5-9639e6cf456e.pdf?v=1612003198\" target=\"_blank\"\u003eHyperion eyepieces application examples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp align=\"center\" style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/1172\/0013\/files\/important_note_proper_opening_of_hyperion_eyepieces_for_focal_length_extension.pdf?v=1612003198\" title=\"Important Note: Proper opening of Hyperion eyepieces for focal length extension\" target=\"_blank\"\u003eImportant Note: Proper opening of Hyperion eyepieces for focal length extension\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44376210669797,"sku":"BAA-HDFT-28 (Baader #2958228)","price":30.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/baader-hyperion-finetuning-ring-m48-28-mm-2958228-astronomy-plus.jpg?v=1715808575","url":"https:\/\/istronomyplus.com\/products\/baader-hyperion-finetuning-ring-m48-28-mm-2958228","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}