{"id":29938,"date":"2025-09-30T16:52:36","date_gmt":"2025-09-30T14:52:36","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=29938"},"modified":"2026-10-13T10:55:44","modified_gmt":"2026-10-13T08:55:44","slug":"celestron-omni-eyepiece-4mm-1-25-inches","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/celestron-omni-oculair-4mm-1-25-inch\/","title":{"rendered":"Celestron Omni eyepiece 4mm 1.25 inches"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Celestron Omni 4 mm: high magnification for the Moon and planets in calm air<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Celestron Omni 4 mm is a classic Plossl eyepiece with four fully multi-coated lens elements. The lens edges are black to reduce internal reflections, resulting in a contrast-rich image with natural colors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With a focal length of 4 mm, you get the highest magnification from the Omni series. Use this eyepiece on clear nights with stable air for lunar craters, Saturn's rings, and Jupiter's cloud bands.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Celestron-Oculair-OMNI-4mm-1-25-.jpg\" alt=\"Celestron Omni eyepiece 4 mm 1.25 inch\" title=\"\"><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Forty-degree Pl\u00f6ssl design with fully multi-coated optics<\/li><li>Blackened lens edges for maximum contrast<\/li><li>Aluminum housing with matte anodized finish to prevent stray light<\/li><li>Foldable rubber eyecup, also usable with glasses<\/li><li>Threads for 1.25-inch (31.75 mm) filters<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fits any 1.25 inch (31.75 mm) focal length or zenith mirror and works with any telescope type: refractor, reflector and catadioptric. The magnification you achieve is the focal length of your telescope divided by 4 mm.<\/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>4 mm<\/td><\/tr><tr><td><strong>Optical design<\/strong><\/td><td>Pl\u00f6ssl, 4 elements<\/td><\/tr><tr><td><strong>Connection size<\/strong><\/td><td>1.25 inches (31.75 mm)<\/td><\/tr><tr><td><strong>Coating<\/strong><\/td><td>Fully multi-coated<\/td><\/tr><tr><td><strong>Filter thread<\/strong><\/td><td>Yes, 1.25 inch<\/td><\/tr><tr><td><strong>Eyecup<\/strong><\/td><td>Rubber, foldable<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find more accessories for this brand at the <a href=\"\/en\/brands\/celestron\/\">Celestron brand page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Celestron Omni 4 mm: classic Plossl eyepiece with fully multi-coated optics, black lens edges, and 1.25 inch port. High magnification for the moon and planets in calm air.<\/p>","protected":false},"featured_media":29940,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[125],"product_cat":[3130,56],"product_tag":[],"class_list":["post-29938","product","type-product","status-publish","has-post-thumbnail","product_brand-celestron","product_cat-oculairen-standaard-gezichtsveld","product_cat-telescoop-accessoires","first","outofstock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"outofstock","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":[12707],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":29926,"url":"https:\/\/www.telescoop.nl\/en\/celestron-omni-12-mm-oculair-125\/","url_meta":{"origin":29938,"position":0},"title":"Celestron Omni eyepiece 12mm 1.25 inches","author":"","date":"30-09-2025","format":false,"excerpt":"Celestron Omni 12 mm: classic Pl\u00f6ssl eyepiece with fully multi-coated optics, blackened lens edges, and a 1.25-inch barrel. Medium-high magnification for the moon, planets, and compact deep-sky objects.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Celestron Omni 12 mm Oculair 1,25\"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Celestron-Oculair-OMNI-12mm-1-25-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Celestron-Oculair-OMNI-12mm-1-25-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Celestron-Oculair-OMNI-12mm-1-25-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Celestron-Oculair-OMNI-12mm-1-25-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Celestron-Oculair-OMNI-12mm-1-25-.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/09\/Celestron-Oculair-OMNI-12mm-1-25-.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":29935,"url":"https:\/\/www.telescoop.nl\/en\/celestron-omni-40-mm-oculair-125\/","url_meta":{"origin":29938,"position":1},"title":"Celestron Omni eyepiece 40mm 1.25 inches","author":"","date":"30-09-2025","format":false,"excerpt":"Celestron Omni 40 mm: classic Plossl eyepiece with fully multi-coated optics, black lens edges and 1.25 inch connection. 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Ideaal voor scherpe observaties van planeten, dubbelsterren en deep-skyobjecten.","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Ploessl-8mm-1-25-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Ploessl-8mm-1-25-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Ploessl-8mm-1-25-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Ploessl-8mm-1-25-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/29938","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=29938"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/29940"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=29938"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=29938"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=29938"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=29938"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}