{"id":16811,"date":"2026-09-18T20:14:26","date_gmt":"2026-09-18T18:14:26","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=16811"},"modified":"2026-10-31T08:48:33","modified_gmt":"2026-10-31T07:48:33","slug":"tele-vue-nagler-type-4-22-mm","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/tele-vue-nagler-type-4-22-mm\/","title":{"rendered":"Tele Vue Nagler Type 4 22 mm \u2013 82\u00b0 Eyepiece"},"content":{"rendered":"<div class=\"product\"><div class=\"product\"><h3>Tele Vue Nagler Type 4 22 mm: Key Features<\/h3>\n<p>The <strong>Tele Vue Nagler Type 4 22 mm<\/strong> is a 22-mm astronomical eyepiece offering an apparent field of <strong>82\u00b0<\/strong>. It mounts on a 2-inch slip-on adapter and has an eye relief of 19 mm. This configuration is worth considering for star fields and extended deep-sky objects, depending on your telescope's focal length.<\/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>Instajust eyecup with notches to adjust the distance and eye alignment; features ample clearance for eyeglasses and DIOPTRX.<\/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>EN4-22.0<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Family<\/th>\n<td>Nagler 4<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Focal length<\/th>\n<td>22 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 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>31.1 mm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Weight<\/th>\n<td>1.5 lb \/ 24 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 45\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 \/>It requires a 2-inch eyepiece holder or a 2-inch right-angle mirror. It cannot be inserted directly into a 1.25-inch mount. Also check that it is securely fastened and properly balanced.<\/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 31.1 mm field stop is the value to use when calculating it.<\/p>\n<h3>Before Ordering<\/h3>\n<p>Check the focus travel, the focus adjustment range, the weight your setup can support, and the compatibility of filters or correctors. The product offered is a Tele Vue Nagler Type 4 22 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_EN4-22.0\" target=\"_blank\" rel=\"noopener\">Tele Vue EN4-22.0 Official Specifications Sheet<\/a>.<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Tele Vue Nagler Type 4 22 mm: focal length 22 mm, apparent field of view 82\u00b0, 2-inch thread, and eye relief 19 mm. Part number EN4-22.0.<\/p>","protected":false},"featured_media":16810,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[629],"product_cat":[695,833,368],"product_tag":[],"class_list":["post-16811","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\/16811","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=16811"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/16810"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=16811"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=16811"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=16811"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=16811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}