{"id":107651,"date":"2026-04-29T08:47:00","date_gmt":"2026-04-29T06:47:00","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=107651"},"modified":"2026-08-23T15:08:02","modified_gmt":"2026-08-23T13:08:02","slug":"televue-everbrite-90-125-zenith-mirror","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/televue-everbrite-90-125-zenitspiegel\/","title":{"rendered":"TeleVue Everbrite 90\u00b0 1.25\u2033 - Diagonal Mirror"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>TeleVue Everbrite 90\u00b0 1,25&#8243; : Zenitspiegel: dielektrische zenitspiegel in 1,25 inch<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Everbrite 90-degree in 1.25-inch is the reference diagonal for refractors and catadioptric telescopes with a 1.25-inch focuser: 99 percent reflectivity, a mirror surface flat to one-tenth of a wavelength, and a color-neutral image.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can see the difference compared to a standard mirror at high magnification: sharper star discs and more contrast in planetary detail.<\/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\/2026\/04\/TeleVue-Everbrite-zenitspiegel-90d-1-25-.jpg\" alt=\"TeleVue Everbrite 90\u00b0 1.25&quot;\" : title=\"\"><\/figure><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Why the dielectric coating matters<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Every star diagonal sits right in the middle of the light path; what the coating does not reflect is lost. The Everbrite mirrors reflect 99 percent across the entire visible spectrum, with a mirror surface polished flat to within one-tenth of a wavelength.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Furthermore, the dielectric coating is hard and wear-resistant: no protective layer that ages, but a surface that lasts for decades and can simply be cleaned.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Preventing the weakest link<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A telescope is only as good as its worst element in the light path. A mediocre star diagonal costs contrast and introduces astigmatism, which is immediately visible at high magnification.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Anyone who invests in eyepieces of this caliber wants the light to reach the eyepiece unaffected. That is what this diagonal is for.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Featured accessories<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The diagonal combines with every eyepiece from the TeleVue lineup; the compression ring also securely holds heavy 2-inch eyepieces. A nebula filter can be screwed directly into the nose of the mirror.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">For whom yes and for whom no<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u2713 Refractors and catadioptric telescopes with 1.25 inch<\/li><li>\u2713 Anyone wanting to get the most out of their eyepieces<\/li><li>\u2713 Planet and moon observers<\/li><li>\u2717 Newtons, they don't need a diagonal<\/li><li>\u2717 Who uses 2-inch eyepieces<\/li><\/ul>\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>Type<\/strong><\/td><td>Zenith mirror 90 degrees<\/td><\/tr><tr><td><strong>Reflection<\/strong><\/td><td>99 percent, dielectric coating<\/td><\/tr><tr><td><strong>Flatness<\/strong><\/td><td>1\/10 wavelength<\/td><\/tr><tr><td><strong>Connection<\/strong><\/td><td>1.25 inches<\/td><\/tr><tr><td><strong>Filter thread<\/strong><\/td><td>In the nose<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">You can find the complete product line for this merk at the <a href=\"\/en\/brands\/televue\/\">TeleVue merk Page<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Everbrite 90-degree 1.25-inch dielectric zenith mirror with 99 percent reflectivity.<\/p>","protected":false},"featured_media":107652,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1551],"product_cat":[56,591,3142],"product_tag":[],"class_list":["post-107651","product","type-product","status-publish","has-post-thumbnail","product_brand-televue","product_cat-telescoop-accessoires","product_cat-diagonalen","product_cat-zenitspiegels-en-zenitprisma-diagonals","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":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":107655,"url":"https:\/\/www.telescoop.nl\/en\/televue-everbrite-60-125-zenitspiegel\/","url_meta":{"origin":107651,"position":0},"title":"TeleVue 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behuizing","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Zenitspiegel-Everbrite-90d-2-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Zenitspiegel-Everbrite-90d-2-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Zenitspiegel-Everbrite-90d-2-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Zenitspiegel-Everbrite-90d-2-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":107760,"url":"https:\/\/www.telescoop.nl\/en\/televue-zenitspiegel-90-125\/","url_meta":{"origin":107651,"position":2},"title":"TeleVue Zenith Mirror 90\u00b0 1.25\u2033 \u2013 Diagonal Mirror","author":"Abdullah Ibrar","date":"29-04-2026","format":false,"excerpt":"Classic TeleVue 90-degree 1.25-inch star diagonal with 96 percent 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