{"id":16807,"date":"2026-09-18T20:14:03","date_gmt":"2026-09-18T18:14:03","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=16807"},"modified":"2026-10-31T08:49:23","modified_gmt":"2026-10-31T07:49:23","slug":"tele-vue-nagler-type-7-5-5-mm","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/tele-vue-nagler-type-7-5-5-mm\/","title":{"rendered":"Tele Vue Nagler Type 7 5.5 mm \u2013 82\u00b0 Eyepiece"},"content":{"rendered":"<div class=\"product\"><div class=\"product\"><h3>Tele Vue Nagler Type 7 5.5 mm: Key Features<\/h3>\n<p>The <strong>Tele Vue Nagler Type 7 5.5 mm<\/strong> is a 5.5-mm astronomical eyepiece offering an apparent field of <strong>82\u00b0<\/strong>. It mounts on a 2-inch and 1.25-inch slip-on adapter and has an eye relief of 19 mm. This configuration is worth considering for lunar and planetary details and double stars, when the instrument\u2019s diameter and atmospheric turbulence permit.<\/p>\n<h3>What is this model best suited for?<\/h3>\n<p>Nagler eyepieces offer an apparent field of view of 82\u00b0. The different types represent distinct design choices: compare the focal length, eye relief, thread type, and weight\u2014not just the product family name.<\/p>\n<ul>\n<li>Designed based on the performance objectives of the Apollo 11 mission; 82\u00b0 field of view and 19 mm eye relief for eyeglass wearers.<\/li>\n<li>Adjustable and lockable barrier; parfocality across the four focal lengths when used with the ASF-8125 HiHat adapter for 1.25-inch and 2-inch modes.<\/li>\n<\/ul>\n<h3>Technical specifications<\/h3>\n<table style=\"width:100%;border-collapse:collapse\">\n<tbody>\n<tr>\n<th scope=\"row\">Manufacturer reference<\/th>\n<td>EN7-05.5<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Family<\/th>\n<td>Nagler 7<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Focal length<\/th>\n<td>5.5 mm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Apparent field<\/th>\n<td>82\u00b0<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Flow<\/th>\n<td>2 and 1.25 inches<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Eye Discharge<\/th>\n<td>19 mm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Field diaphragm<\/th>\n<td>8.1 mm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Weight<\/th>\n<td>1.29 lb \/ 20.6 oz<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Frequently asked questions<\/h3>\n<p><strong>What is the magnification with this eyepiece?<\/strong><br \/>With a telescope that has a focal length of 1,000 mm, this eyepiece provides approximately 182\u00d7 magnification. The magnification is calculated by dividing the telescope\u2019s focal length by that of the eyepiece.<\/p>\n<p><strong>Is it compatible with my telescope?<\/strong><br \/>The double slide allows for both of the specified formats. Check the clamping position, the focusing travel, and the clearances with your angle drive or focus adjuster.<\/p>\n<p><strong>Can you observe things with glasses?<\/strong><br \/>The specified eye relief is 19 mm. Comfort when wearing glasses also depends on their shape and how the eye is positioned; trying them on is always better than relying on a one-size-fits-all guarantee. The Tele Vue chart indicates DIOPTRX compatibility; this astigmatism corrector is optional.<\/p>\n<p><strong>Is the apparent field the field visible in the sky?<\/strong><br \/>No. The apparent field of view of 82\u00b0 describes the view through the eyepiece. The actual field of view depends on the telescope; the field stop of 8.1 mm is the value to use to calculate it.<\/p>\n<h3>Before Ordering<\/h3>\n<p>Check the focus travel, the focus range, the maximum weight your setup can support, and the compatibility of filters or correctors. The product offered is a Tele Vue Nagler Type 7 5.5 mm eyepiece; the accessories listed are optional. The availability shown reflects our supplier\u2019s status at the time of the last check and does not indicate a reserved quantity.<\/p>\n<p>Features and Compatibility: <a href=\"https:\/\/www.televue.com\/engine\/TV3b_page.asp?ID=21&amp;Tab=EP_EN7-05.5\" target=\"_blank\" rel=\"noopener\">Tele Vue EN7-05.5 Official Data Sheet<\/a>.<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Tele Vue Nagler Type 7 5.5 mm: focal length 5.5 mm, apparent field of view 82\u00b0, 2-inch and 1.25-inch threads, and eye relief 19 mm. Part number EN7-05.5.<\/p>","protected":false},"featured_media":16806,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[629],"product_cat":[695,833,368],"product_tag":[],"class_list":["post-16807","product","type-product","status-publish","has-post-thumbnail","product_brand-televue","product_cat-oculaires-et-smart-oculaires","product_cat-en-stock","product_cat-visuel","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/16807","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/comments?post=16807"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/16806"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=16807"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=16807"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=16807"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=16807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}