{"id":17689,"date":"2026-09-21T08:45:58","date_gmt":"2026-09-21T06:45:58","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&#038;p=17689"},"modified":"2026-09-21T08:46:17","modified_gmt":"2026-09-21T06:46:17","slug":"omegon-57296-barlow-oberon","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/omegon-57296-barlow-oberon\/","title":{"rendered":"Omegon Barlow Oberon 2,5x &#8211; 2 pouces"},"content":{"rendered":"<h3>Adjust the magnification to suit your observation<\/h3>\n<p>La Omegon Barlow Oberon 2,5x augmente la focale effective de votre t\u00e9lescope afin d\u2019obtenir un grossissement nominal multipli\u00e9 par 2,5 avec le m\u00eame oculaire. Elle permet de compl\u00e9ter une gamme d\u2019oculaires sans changer d\u2019instrument, notamment pour l\u2019observation de la Lune et des plan\u00e8tes. Son coulant c\u00f4t\u00e9 t\u00e9lescope est au format <strong>2 inches (50.8 mm)<\/strong>. The version number is <strong>57296<\/strong> : The factor and diameter must be considered together when making a selection.<\/p>\n<h3>Quatre lentilles et serrage annulaire<\/h3>\n<p>La Barlow Oberon associe quatre lentilles trait\u00e9es multicouches \u00e0 une bague de compression pour maintenir l\u2019accessoire. Le facteur nominal 2,5x offre une amplification interm\u00e9diaire entre les solutions 2x et 3x. Le bo\u00eetier comporte un filetage pour filtres 2 pouces et un adaptateur de 2 vers 1,25 pouce.<\/p>\n<h3>Pr\u00e9parer la cha\u00eene optique<\/h3>\n<p>La longueur optique annonc\u00e9e est de 48 mm, ou 60 mm avec l\u2019adaptateur, et la longueur du coulant est de 33 mm. La masse de 300 g doit \u00eatre prise en compte avec un oculaire ou une cam\u00e9ra. V\u00e9rifiez le maintien m\u00e9canique et la course de mise au point ; un bouchon de protection accompagne la Barlow.<\/p>\n<h3>Technical specifications<\/h3>\n<table style=\"width:100%;max-width:100%;border-collapse:collapse\">\n<tbody>\n<tr>\n<th style=\"text-align:left;padding:8px\">Brand<\/th>\n<td style=\"padding:8px\">Omegon<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align:left;padding:8px\">Reference<\/th>\n<td style=\"padding:8px\">57296<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align:left;padding:8px\">Rated amplification<\/th>\n<td style=\"padding:8px\">2,5x<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align:left;padding:8px\">Flow on the telescope side<\/th>\n<td style=\"padding:8px\">2 inches (50.8 mm)<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align:left;padding:8px\">Number of lenses<\/th>\n<td style=\"padding:8px\">4<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align:left;padding:8px\">Approximate weight<\/th>\n<td style=\"padding:8px\">300 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Choice Questions<\/h3>\n<p><strong>How do you calculate the magnification?<\/strong> Divide the telescope's focal length by that of the eyepiece, then apply the nominal magnification factor of this amplifier as intended for its configuration. Very high magnification can reduce apparent brightness and accentuate turbulence: choose a reasonable combination for your instrument.<\/p>\n<p><strong>Is it compatible with any camera?<\/strong> The insertion diameter alone is not enough to guarantee compatibility with a camera. You must also check the mount, the focal length, the field of view, and whether the camera can be focused. A camera or telescope is not included.<\/p>\n<p><a href=\"https:\/\/www.omegon.eu\/barlow-lenses\/omegon-barlow-lens-2-5x-2r\/p,57296\" target=\"_blank\" rel=\"noopener\">Omegon Official Documentation<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Omegon Barlow Oberon 2,5x, au coulant 2 pouces (50,8 mm). Optique \u00e0 4 lentilles pour compl\u00e9ter votre \u00e9quipement d\u2019observation et vos montages photographiques compatibles.<\/p>","protected":false},"featured_media":17688,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[945],"product_cat":[369],"product_tag":[],"class_list":["post-17689","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-barlows","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/17689","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=17689"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/17688"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=17689"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=17689"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=17689"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=17689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}