{"id":34219,"date":"2025-11-17T15:31:20","date_gmt":"2025-11-17T14:31:20","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=34219"},"modified":"2026-03-03T20:25:28","modified_gmt":"2026-03-03T19:25:28","slug":"william-optics-90-125-dura-bright-zenith-mirror","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/william-optics-90-125-dura-bright-zenitspiegel\/","title":{"rendered":"William Optics 90\u00b0, 1.25\u2033 Dura Bright zenith mirror"},"content":{"rendered":"

With the William Optics 90<\/strong> Dura Bright zenith mirror you instantly get more out of your telescope. Your image becomes brighter, sharper and quieter, even when looking at difficult objects such as planets, the moon or close double stars. This accessory is small, but the difference you see is big.<\/p>\n\n\n\n

\"William<\/figure>\n\n\n\n

The mirror has a special dielectric coating that 99% of light reflected back<\/strong>. That means almost all the light your telescope captures actually reaches your eye. This keeps your image bright and full of contrast, even at high magnification.<\/p>\n\n\n\n

The thick 12 mm mirror provides stable images<\/strong> without distortion. You can see details that would otherwise be lost. The mirror is polished to 1\/10th wave accuracy, which simply means the surface is extremely flat. This keeps your image tight and true to nature.<\/p>\n\n\n\n

\"William<\/figure>\n\n\n\n

You don't have to adjust anything. The internal alignment remains stable, so you can fully focus on looking instead of adjusting.<\/p>\n\n\n\n

The housing is made of high-quality aluminum, with real carbon fiber side plates for added strength. The large thumb screws give you grip, even with gloves, and the brass ring clamp holds your eyepiece without scratching it. Inside, anti-reflection baffling prevents stray light, keeping your image deep black where it should be black.<\/p>\n\n\n\n

Safety is also built in: an internal stopper stops your eyepiece before it hits the mirror. Convenient and reassuring.<\/p>\n\n\n\n

This is a zenith mirror that does exactly what a premium accessory should do: enhance your image without the hassle.<\/p>\n\n\n\n

Specifications<\/strong><\/h3>\n\n\n\n

Capacity<\/strong><\/h3>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Optics coating<\/td>Dielectric<\/td><\/tr>
Telescope connection<\/td>1,25\u2033<\/td><\/tr>
Ocular connection<\/td>1,25\u2033<\/td><\/tr>
Surface accuracy<\/td>1\/10<\/td><\/tr>
Reflection<\/td>99%<\/td><\/tr>
Insight<\/td>90\u00b0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Details<\/strong><\/h3>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Filter thread<\/td>Yes<\/td><\/tr>
Ring clamp<\/td>Yes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

General<\/strong><\/h3>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Weight<\/td>210 g<\/td><\/tr>
Type<\/td>Divergent optics<\/td><\/tr>
Design<\/td>Diagonal mirror<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

William Optics 90 comes with dielectric mirror coating, 1.25\u2033 eyepiece connector, compression ring, carbon fiber side plates and adapter - for exceptionally clear image and maximum contrast.<\/p>","protected":false},"featured_media":97588,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[56,591,3142],"product_tag":[],"class_list":["post-34219","product","type-product","status-publish","has-post-thumbnail","product_brand-william-optics","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":34220,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-90-2-diagonaal-spiegel-dura-bright\/","url_meta":{"origin":34219,"position":0},"title":"William Optics 90\u00b0 2\u2033 Diagonal Mirror Dura Bright","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 90\u00b0 wordt geleverd met 2\" en 1,25\" oculairadapter, dielectrische spiegelcoating, compressiering, filterdraad en carbon behuizing \u2013 klaar voor maximale helderheid en contrast. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-90%C2%B0-2-Diagonaal-Spiegel-Dura-Bright-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-90%C2%B0-2-Diagonaal-Spiegel-Dura-Bright-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-90%C2%B0-2-Diagonaal-Spiegel-Dura-Bright-1.jpg?resize=525%2C300&ssl=1 1.5x, 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90\u00b0 comes with silver zenith prism, 1.25\" eyepiece connector, M56 telescope connector and ring clamp - perfect for RedCat 51 nature observation with upright viewing.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-90%C2%B0-125-Zenitprisma-RedCat-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-90%C2%B0-125-Zenitprisma-RedCat-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-90%C2%B0-125-Zenitprisma-RedCat-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-90%C2%B0-125-Zenitprisma-RedCat-1.jpg?resize=700%2C400&ssl=1 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