{"product_id":"31mm-nagler-type-5-eyepiece-2-en5-31-0","title":"Tele Vue 31mm Nagler Type 5 Eyepiece - 2\" - EN5-31.0","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAbout the TeleVue 31mm Nagler Type 5 Eyepiece - 2\"...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eWith the \u003cb\u003eTeleVue 31mm Nagler Type 5 Eyepiece\u003c\/b\u003e, the unique 6-element design using four exotic glasses, maintains the contrast advancement while achieving a true field area 82% larger than the 22mm Type 4 \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e! Owners of fast Dobsonian\/Newtonian \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescopes\u003c\/a\u003e can enjoy a larger true field, free of secondary shadowing, than ever before.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eCompare a penny to a half dollar to see the relative size between a 50 degree and 82 degree apparent field - almost 3 times the area difference! And while other \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e 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 1.25\" \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e models and rubber grip rings are additional Tele Vue \"firsts\". Even 2\"\/1.25\" barrel models have an additional feature allowing the 2\" extension tube (EBX-2120) to be screwed on, which permits use of 2\" \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=10\"\u003eTeleVue Eyepiece Filters\u003c\/a\u003e as well as 1.25\". 100% full field visual inspection on TeleVue''s own flat-field test instruments guarantees the performance of every \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ci\u003e\"You may know there''s a long history of naming \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003etelescope eyepieces\u003c\/a\u003e 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\/i\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWith \u003ca href=\"http:\/\/khanscope.com\/accessDetails.cfm?productID=5224\"\u003eTeleVue Telescope Eyepiece\u003c\/a\u003e \"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 \u003ca href=\"http:\/\/khanscope.com\/newEquipCart.cfm?catID=1\u0026amp;subcatID=1\"\u003etelescope\u003c\/a\u003e to virtually \"disappear,\" leaving the impact of \"spacewalk\" viewing.\" --Al Nagler\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBe sure to check out our line of \u003ca href=\"http:\/\/khanscope.com\/newEquipList.cfm?catID=1\u0026amp;subCatID=1\u0026amp;manID=7\"\u003eTeleVue Telescopes\u003c\/a\u003e, \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=13\"\u003eTeleVue Telescope Mounts\u003c\/a\u003e and \u003ca href=\"http:\/\/www.khanscope.com\/accessList.cfm?catID=3\u0026amp;subcatID=15\"\u003eTeleVue Telescope Accessories\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 31mm Nagler Type 5 Eyepiece - 2\" Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBlackened lens edges, anti-reflection threads and rubber eyeguards deliver maximum contrast\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eUnique 6-element design using four exotic glasses\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdapter skirts for 2\" focusers on larger 1.25\" models and rubber grip rings\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaintains the contrast advancement while achieving a true field area 82%\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e100% full field visual inspection on TeleVue''s own flat-field test instruments guarantees the performance of every Tele Vue eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eTeleVue 31mm Nagler Type 5 Eyepiece - 2\" Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eFocal Length (mm): 31\u003c\/p\u003e\n\u003cp\u003eBarrel Size (in.): 2\"\u003c\/p\u003e\n\u003cp\u003eApparent Field of View (deg.): 82\u003c\/p\u003e\n\u003cp\u003eEye Relief (mm): 19\u003c\/p\u003e\n\u003cp\u003eWeight (lb \/ oz): 2.20 \/ 35.2\u003c\/p\u003e\n\u003cp\u003eField Stop (mm): 42\u003c\/p\u003e\n\u003cp\u003eWarranty: Limited Lifetime\u003c\/p\u003e\n\u003cp\u003eTeleVue Product Number: EN5-31.0\u003c\/p\u003e","brand":"TeleVue","offers":[{"title":"Default","offer_id":10552419329,"sku":"TEL-EN5-31.0","price":713.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/products\/EP_EN5-31.0.jpeg?v=1776459089","url":"https:\/\/khanscope.com\/en-fr\/products\/31mm-nagler-type-5-eyepiece-2-en5-31-0","provider":"Khan Scope Centre","version":"1.0","type":"link"}