{"id":16738,"date":"2026-09-18T20:05:27","date_gmt":"2026-09-18T18:05:27","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=16738"},"modified":"2026-10-31T08:47:29","modified_gmt":"2026-10-31T07:47:29","slug":"tele-vue-delos-17-3-mm","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/tele-vue-delos-17-3-mm\/","title":{"rendered":"Tele Vue Delos 17.3 mm \u2013 72\u00b0 Eyepiece"},"content":{"rendered":"<div class=\"product\"><div class=\"product\"><h3>Delos 17.3 mm Eyepiece: Key Features<\/h3>\n<p>The <strong>Delos 17.3 mm Eyepiece<\/strong> is a 17.3-mm astronomical eyepiece offering an apparent field of <strong>72\u00b0<\/strong>. It mounts on a 1.25-inch barrel and has an eye relief of 20 mm. This configuration is worth considering for star clusters, compact deep-sky objects, and general-purpose observing, depending on your telescope\u2019s focal length.<\/p>\n<h3>What is this model best suited for?<\/h3>\n<p>The Delos series combines a 72\u00b0 field of view with an adjustable eyecup. The height adjustment helps you find the correct eye position and minimizes stray light around the lens. Be sure to check the specific specifications for this focal length rather than assuming they are the same as those for another Delos model.<\/p>\n<ul>\n<li>With the Paracorr Type 2, the In-Travel 2-to-1.25-inch adapter makes the Delos 17.3 and 14 mm lenses parfocal with most other 1.25-inch Tele Vue lenses when using the Paracorr reducer.<\/li>\n<li>Adjustable and lockable windscreen.<\/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>EDL-17.3<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Family<\/th>\n<td>Delos<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Focal length<\/th>\n<td>17.3 mm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Apparent field<\/th>\n<td>72\u00b0<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Flow<\/th>\n<td>1.25 inches<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Eye Discharge<\/th>\n<td>20 mm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Field diaphragm<\/th>\n<td>21.2 mm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Weight<\/th>\n<td>0.9 lb \/ 14.4 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 \/>When used with a telescope that has a focal length of 1,000 mm, this eyepiece provides approximately 58\u00d7 magnification. The magnification is calculated by dividing the telescope's focal length by that of the eyepiece.<\/p>\n<p><strong>Is it compatible with my telescope?<\/strong><br \/>It uses a 1.25-inch mount. In a 2-inch eyepiece holder, a suitable adapter is required. The ability to focus also depends on the optical path of the accessories.<\/p>\n<p><strong>Can you observe things with glasses?<\/strong><br \/>The specified eye relief is 20 mm. Comfort when wearing glasses also depends on their shape and the position of the eye; trying them on is always better than relying on a universal 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 72\u00b0 describes the view through the eyepiece. The actual field of view depends on the telescope; the field stop of 21.2 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 Delos 17.3 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=183&amp;Tab=EP_EDL-17.3\" target=\"_blank\" rel=\"noopener\">Tele Vue EDL-17.3 Official Spec Sheet<\/a>.<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Delos 17.3 mm Tele Vue: focal length 17.3 mm, apparent field of view 72\u00b0, 1.25-inch thread, and 20 mm eye relief. Part number EDL-17.3.<\/p>","protected":false},"featured_media":16737,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[629],"product_cat":[695,833,368],"product_tag":[],"class_list":["post-16738","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\/16738","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=16738"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/16737"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=16738"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=16738"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=16738"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=16738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}