{"id":32346,"date":"2025-11-02T13:00:55","date_gmt":"2025-11-02T12:00:55","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=32346"},"modified":"2026-08-23T15:12:24","modified_gmt":"2026-08-23T13:12:24","slug":"bresser-kellner-eyepiece-20mm-1-25-inches","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/bresser-kellner-oculair-20mm-1-25-inch\/","title":{"rendered":"Bresser Kellner eyepiece 20mm 1.25 inches"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Bresser Kellner eyepiece 20mm 1.25 inch: affordable spare eyepiece<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Bresser Kellner 20 mm is a simple eyepiece with three coated lenses. With a 20 mm focal length, you get a medium magnification with a wide field of view, suitable for the moon and bright deep-sky objects.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bresser also offers this eyepiece as a replacement part for its own entry-level telescopes. It is therefore primarily an affordable replacement or addition to a standard set, not an upgrade: if you want even sharper images and higher contrast, choose a Plossl eyepiece from the same series.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-3 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-Oculair-Kellner-20mm-125-1.jpg\" alt=\"Bresser Kellner eyepiece 20 mm 1.25 inch\" title=\"\"><\/figure><figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-Oculair-Kellner-20mm-125-2.jpg\" alt=\"Bresser Kellner eyepiece 20 mm 1.25 inch\" title=\"\"><\/figure><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Three coated lenses in a classic Kellner design<\/li><li>Reversible rubber eyecup for viewing comfort<\/li><li>Standard 1.25-inch barrel, fits virtually any telescope<\/li><li>Economical replacement for a lost or damaged standard eyepiece<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fits into any 1.25-inch (31.7 mm) focuser or star diagonal, and therefore on virtually any entry-level and mid-range telescope. Can also be used separately alongside the eyepieces that came with your telescope.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Focal length<\/strong><\/td><td>20 mm<\/td><\/tr><tr><td><strong>Optical design<\/strong><\/td><td>Waiter, 3 lenses<\/td><\/tr><tr><td><strong>Coating<\/strong><\/td><td>Coated lenses<\/td><\/tr><tr><td><strong>Mount<\/strong><\/td><td>1.25 inches (31.7 mm)<\/td><\/tr><tr><td><strong>Eyecup<\/strong><\/td><td>Reversible rubber<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more accessories for this merk at the <a href=\"\/en\/brands\/bresser\/\">Bresser 1TP5 Page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Bresser Kellner 20 mm eyepiece with three coated lenses and rubber eyecup. Affordable replacement or addition, 1.25-inch barrel.<\/p>","protected":false},"featured_media":96605,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[128],"product_cat":[3130,589,56],"product_tag":[],"class_list":["post-32346","product","type-product","status-publish","has-post-thumbnail","product_brand-bresser","product_cat-oculairen-standaard-gezichtsveld","product_cat-optische-accessoires-v1","product_cat-telescoop-accessoires","product_shipping_class-licht","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[32310],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":32361,"url":"https:\/\/www.telescoop.nl\/en\/bresser-kellner-oculair-10mm-1-25-inch\/","url_meta":{"origin":32346,"position":0},"title":"Bresser Kellner eyepiece 10mm 1.25 inches","author":"","date":"02-11-2025","format":false,"excerpt":"Bresser Kellner 10 mm eyepiece with three coated lenses and rubber eyecup. Affordable replacement or addition, 1.25-inch barrel.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-Oculair-Kellner-10mm-125-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":29253,"url":"https:\/\/www.telescoop.nl\/en\/bresser-oculair-kellner-4mm-125\/","url_meta":{"origin":32346,"position":1},"title":"Bresser Kellner Eyepiece 4mm 1.25\u2033","author":"","date":"22-09-2025","format":false,"excerpt":"Bresser Kellner eyepiece 4 mm for very high magnifications on the Moon and planets. 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Met dit complete Bresser voordeelpakket haal je alles in huis om vanavond nog de kraters op de maan en de ringen van Saturnus te ontdekken. In plaats van losse onderdelen te zoeken, hebben wij de ideale combinatie voor je samengesteld: de\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"bresser telescoop starterpakket","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/02\/Bresser-Telescoop-AC-70-700-Nano-AZ.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/02\/Bresser-Telescoop-AC-70-700-Nano-AZ.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/02\/Bresser-Telescoop-AC-70-700-Nano-AZ.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/02\/Bresser-Telescoop-AC-70-700-Nano-AZ.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/02\/Bresser-Telescoop-AC-70-700-Nano-AZ.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/02\/Bresser-Telescoop-AC-70-700-Nano-AZ.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":32496,"url":"https:\/\/www.telescoop.nl\/en\/bresser-2x-barlow-lens-1-25-inch\/","url_meta":{"origin":32346,"position":4},"title":"Bresser 2x Barlow lens 1.25 inches","author":"","date":"03-11-2025","format":false,"excerpt":"Bresser 2x Barlow lens with achromatic, multi-coated lens design. Increases the magnification of any 1.25 inch eyepiece by a factor of 2x.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":32495,"url":"https:\/\/www.telescoop.nl\/en\/bresser-3x-barlow-lens-1-25-inch\/","url_meta":{"origin":32346,"position":5},"title":"Bresser 3x Barlow lens 1.25 inches","author":"","date":"03-11-2025","format":false,"excerpt":"Bresser 3x Barlow lens with achromatic, multi-coated lens design. Increases the magnification of any 1.25 inch eyepiece by a factor of 3x.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/32346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=32346"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/96605"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=32346"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=32346"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=32346"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=32346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}