{"id":34142,"date":"2025-11-17T13:22:10","date_gmt":"2025-11-17T12:22:10","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=34142"},"modified":"2026-03-12T08:30:39","modified_gmt":"2026-03-12T07:30:39","slug":"william-optics-90-125-zenith-prism-cat-51-wifd","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/william-optics-90-125-zenitprisma-cat-51-wifd\/","title":{"rendered":"William Optics 90\u00b0 1.25\u2033 Zenith prism Cat 51 WIFD"},"content":{"rendered":"

Look relaxed, without neck pain<\/strong>
The William Optics 90\u00b0 zenith prism lets you look up comfortably, even during long sessions. The prism deflects light 90\u00b0, so you don't have to stretch or twist. You just look straight into the eyepiece and stay relaxed.<\/p>\n\n\n\n

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

Natural image, ideal for nature and Moon<\/strong>
The prism straightens out the inverted telescope image. That makes it perfect for birds, landscape and anything you want to view during the day. You also see the Moon as you see it outside. No strange rotations. No hassle with orientation. You recognize craters and valleys at a glance.<\/p>\n\n\n\n

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

Clear and sharp thanks to premium glass<\/strong>
BaK-4 glass and a dielectric coating keep your image clear. Reflections stay low, contrast stays high. This means you see fine details better. Stars stay sharp. The Moon shows more structure. Everything feels just a little nicer and quieter.<\/p>\n\n\n\n

Fits effortlessly into your setup<\/strong>
With the 1.25\u2033 connection, you can easily click the prism into many telescopes. It works perfectly with the William Optics RedCat 51 WIFD. The ring clamp holds your eyepiece securely without damaging it.
The included 2\u2033 \/ 1.25\u2033 adapter makes changing fast and easy.<\/p>\n\n\n\n

Compact, sturdy and ready for outdoor use<\/strong>
The aluminum house feels solid and is built for years of use under the stars as well as in nature. You easily take it with you and put it back in just as quickly.<\/p>\n\n\n\n

Specifications<\/h2>\n\n\n\n

Capacity<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Insight<\/td>90\u00b0<\/td><\/tr>
Connection on the other side<\/td>1,25\u2033<\/td><\/tr>
Optics coating<\/td>Dielectric<\/td><\/tr>
Glass material<\/td>BaK-4<\/td><\/tr>
Suitable for telescopes<\/td>William Optics RedCat 51 WIFD<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Details<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Ring clamp<\/td>Yes<\/td><\/tr>
Correction upright image<\/td>Yes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Equipment<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Eyepiece adapter<\/td>2\u2033 \/ 1,25\u2033<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

General<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Type<\/td>Divergent optics<\/td><\/tr>
Design<\/td>Zenith prism<\/td><\/tr>
Exterior material<\/td>Aluminum<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

<\/p>","protected":false},"excerpt":{"rendered":"

William Optics 90\u00b0 comes with dielectric coated BaK-4 zenith prism, 2\u2033\/1.25\u2033 adapter, ring clamp and upright image correction - perfect for nature and moon observation.<\/p>","protected":false},"featured_media":97578,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[643],"product_cat":[56,591,3142],"product_tag":[],"class_list":["post-34142","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":34141,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-90-125-zenitprisma-redcat\/","url_meta":{"origin":34142,"position":0},"title":"William Optics 90\u00b0 1.25\u2033 Zenith prism RedCat","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 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 2x"},"classes":[]},{"id":34218,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-45-125-op-125-amici-prisma\/","url_meta":{"origin":34142,"position":1},"title":"William Optics 45\u00b0, 1.25\u2033 on 1.25\u2033 Amici prism","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 45\u00b0 wordt geleverd met Amici-prisma met 1,25\" aansluiting, rechtopstaand en correct beeld, BaK-4 glas en messing ringklem \u2013 ideaal voor natuur- en hemelobservatie.","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-45%C2%B0-125-op-125-Amici-prisma.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-45%C2%B0-125-op-125-Amici-prisma.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-45%C2%B0-125-op-125-Amici-prisma.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-45%C2%B0-125-op-125-Amici-prisma.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":34225,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-50mm-1-25-inch-zoeker-rechtopstaand-beeld-90-graden\/","url_meta":{"origin":34142,"position":2},"title":"William Optics 50 mm 1.25\u2033 Viewfinder Upright View 90\u00b0","author":"","date":"17-11-2025","format":false,"excerpt":"William Optics 50mm 1.25 comes with aluminum body, spiral focuser, 1.25\" eyepiece port, upright and side-corrected image - 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