{"product_id":"tele-vue-nagler-17mm-type-4-eyepiece-pre-owned","title":"Tele Vue Nagler 17mm Type 4 Eyepiece - (Pre-owned)","description":"\u003cp\u003e\u003cspan style=\"color: rgb(245, 15, 15);\"\u003e\u003cstrong\u003eIn Mint Condition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe Tele Vue 17mm Type 4 Nagler eyepiece provides excellent contrast, reduced pincushion, more true field, and longer eye-relief. With added eye-relief, the click-stop Instadjust eyeguard helps maintain proper eye distance and centration. For deep sky viewing, the comfort, clarity and contrast gets users closer to Tele Vue's \"spacewalk\" viewing goal.\u003c\/p\u003e\n\u003cp\u003eAll Tele Vue Nagler eyepieces have proprietary tuned full multi-coatings, blackened lens edges, high index glasses, fold-down eyeguards, rubber grip rings, cover for the eyeguard, an undercut in the barrel for extra locking security, and filter threads. All Tele Vue eyepiece lines are proprietary, in-house designs manufactured to their specifications and tolerances. Every eyepiece is individually tested at Tele Vue to ensure it meets high optical and cosmetic standards.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTake a \"spacewalk\" across a wide, sharp 82° apparent field\u003cbr\u003e\u003c\/strong\u003eCompare a penny to a half dollar to see the relative size between a 50° and 82° apparent field - almost 3 times the area difference! And while others boast of impressive apparent field sizes, Tele Vue's philosophy of \"showing no field unless it's fine\" stresses full field image quality as the ingredient for impressive views. Blackened lens edges, anti-reflection threads and rubber eyeguards deliver maximum contrast. Adapter skirts for 2\" focusers on larger 1¼\" models and rubber grip rings are additional Tele Vue \"firsts\". Even 2\"\/1¼\" barrel models have an additional feature allowing the 2\" extension tube (EBX-2120, sold separately) to be screwed on, which permits use of 2\" filters as well as 1¼\". 100% full field visual inspection on TeleVue's flat-field test instruments guarantees the performance of every Tele Vue eyepiece.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConcept:\u003c\/strong\u003e\u003cem\u003e \"You may know there's a long history of naming eyepieces after their designers: Kellner, Erfle and Plossl, to name a few. In the late 70's I designed an eyepiece sufficiently radical that I dared attach my name to it. Even today, I must admit a little discomfort when talking about \"Nagler\" eyepieces.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWith \"Naglers\", my aim is to approach the wide angle perspective of naked eye vision, while maintaining the highest degree of sharpness, contrast, and viewing comfort. The goal is to allow the telescope to virtually \"disappear,\" leaving the impact of \"spacewalk\" viewing.\"\u003c\/em\u003e — Al Nagler\u003c\/p\u003e\n\u003cdiv id=\"pageSectionTitle\"\u003e\u003cstrong\u003eWhy Are There 3 Types of Naglers?\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003eTo achieve the full magnification range over 82° apparent field of view requires two types: Nagler Type-5 with focal lengths of 31, 26, 20, 16mm and Nagler Type-6 with focal lengths of 13, 11, 9, 7, 5, 3.5, 2.5mm.\u003c\/div\u003e\n\u003cp\u003eThe Type-5 permits the largest true field possible (31mm has 42mm field stop), while the shorter focal length Type-6 models are parfocal, with similiar size and weight and all with a comfortable 12mm eye relief.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable class=\"additional-attributes w-full s1600:text-sm\" style=\"width: 100%; height: 466.657px;\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eManufacturer\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Manufacturer\" style=\"width: 44.8634%; height: 19.5938px;\"\u003eTele Vue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eEyepiece Series\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Eyepiece Series\" style=\"width: 44.8634%; height: 19.5938px;\"\u003eNalger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Focal Length\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e17mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eBarrel Size\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Barrel Size\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e2\" (50.8mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eApparent Field of View (Mfg Specified)\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Apparent Field of View (Mfg Specified)\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e82°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eEye Relief (Designed)\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Eye Relief (Designed)\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e17mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eFilter Threads\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Filter Threads\" style=\"width: 44.8634%; height: 19.5938px;\"\u003eStandard 2\" Filter Thread (M48 x 0.75)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eCoatings\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Coatings\" style=\"width: 44.8634%; height: 19.5938px;\"\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eLens Elements\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Lens Elements\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eLens Groups\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Lens Groups\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eBlackened Lens Edges\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Blackened Lens Edges\" style=\"width: 44.8634%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eBarrel Type\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Barrel Type\" style=\"width: 44.8634%; height: 19.5938px;\"\u003eWith safety undercut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003e\u003cbr\u003e\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Protective Storage Container Included\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 39.1875px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 39.1875px;\"\u003e\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Protective Plastic Storage Container Size (Sold Separately)\" style=\"width: 44.8634%; height: 39.1875px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eMaximum Width\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Maximum Width\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e2.4\" (61.0mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eField Stop Diameter\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Field Stop Diameter\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e24.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eParfocal\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Parfocal\" style=\"width: 44.8634%; height: 19.5938px;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eRubber Eye Guard\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Rubber Eye Guard\" style=\"width: 44.8634%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003e\u003cbr\u003e\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Warranty\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 19.5938px;\"\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Weight\" style=\"width: 44.8634%; height: 19.5938px;\"\u003e25.6 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"border-b border-[#f2f2f2] last:border-b-0\" style=\"height: 55.1875px;\"\u003e\n\u003cth class=\"col label w-1\/2 py-4 pr-4 text-left text-black font-semibold product-attribute-label s1600:py-2\" scope=\"row\" style=\"width: 52.8144%; height: 55.1875px;\"\u003eMisc. Information\u003c\/th\u003e\n\u003ctd class=\"col data w-1\/2 py-4 pr-4 text-left text-black font-normal product-attribute-value s1600:py-2\" data-th=\"Misc. Information\" style=\"width: 44.8634%; height: 55.1875px;\"\u003e\n\u003cp\u003e- Suitable for use with Tele Vue Dioptrx \/ digiscoping\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":68655811297393,"sku":"USED111002","price":244.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/20261110_124807.jpg?v=1794333284","url":"https:\/\/khanscope.com\/fr-fr\/products\/tele-vue-nagler-17mm-type-4-eyepiece-pre-owned","provider":"Khan Scope Centre","version":"1.0","type":"link"}