{"id":32351,"date":"2025-11-02T13:07:14","date_gmt":"2025-11-02T12:07:14","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=32351"},"modified":"2026-10-13T11:06:26","modified_gmt":"2026-10-13T09:06:26","slug":"bresser-ac-90-900-telescope-messier-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/bresser-ac-90-900-telescoop-messier-ota\/","title":{"rendered":"Bresser AC 90\/900 Telescope Messier OTA"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>The classic f\/10 refractor as a standalone tube, with solar filters!<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Bresser AC 90\/900 Messier OTA is the classic all-around refractor for your own mount. The f\/10 design keeps chromatic aberration well under control: the Moon, planets, and double stars appear calm and sharp. The included solar filters also allow for safe solar observation.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" data-id=\"32354\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-Telescoop-AC-90-900-Messier-OTA-2.jpg\" alt=\"Bresser AC 90\/900 optical tube with SP 26 mm Super Pl\u00f6ssl eyepiece and 6\u00d730 optical viewfinder\" class=\"wp-image-32354\" title=\"\"><\/figure>\n<\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8d39b2df wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Bresser-AC-90-900-Telescoop-Messier-OTA-3.jpg\" alt=\"Bresser AC 90\/900 close-up of focuser with 90\u00b0 star diagonal\" class=\"wp-image-32355\" title=\"\"><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">Classic f\/10 achromatic<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The 90 mm lens captures approximately 165 times more light than the naked eye. With the 26 mm eyepiece, you get 35x magnification; consider approximately 180x as the maximum. The integrated dew shield keeps the lens free from dew for longer. Use solar filters only if they are undamaged and never look at the sun without certified protection.<\/p>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Which mount fits this?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The Bresser EXOS-1\/EQ-4 mount with tripod (\u20ac379) carries this tube with ease; a sturdy azimuthal mount with a Vixen clamp also suffices visually. Via the Vixen-Style dovetail, the tube fits any mount with a standard Vixen clamp.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Included<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Achromatic optics 90\/900<\/li>\n\n\n\n<li>SP 26mm eyepiece (1.25 inch)<\/li>\n\n\n\n<li>6\u00d730 viewfinder<\/li>\n\n\n\n<li>90 degree star diagonal<\/li>\n\n\n\n<li>Integrated lens hood<\/li>\n\n\n\n<li>Vixen-Style Split Rings<\/li>\n\n\n\n<li>Solar filters<\/li>\n\n\n\n<li>Smartphone camera adapter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Featured accessories<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.telescoop.nl\/en\/bresser-eyepiece-plossl-pl-10mm-125\/\">Bresser Pl\u00f6ssl 10 mm eyepiece<\/a> (90x, 29 euros) is the medium magnification. An Omegon Premium moon filter (19.90 euros) dims the moonlight. For transport, the <a href=\"https:\/\/www.telescoop.nl\/en\/transport-bag-for-refractor-telescopes-100-2\/\">Shield transport bag for refractors up to 100\/900<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">For whom yes, for whom no<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Suitable for: anyone looking for a maintenance-free all-rounder for the Moon, planets, and Sun on an existing mount.\nNot suitable for: deep-sky photographers; the small aperture and f\/10 are not intended for that. Compare to <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/refracting-telescopes\/\">refractor page<\/a>. Meer Bresser is on the <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/bresser\/\">brand page<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Optical design<\/td><td>Achromatic refractor (two-lens)<\/td><\/tr><tr><td>Opening<\/td><td>90 mm<\/td><\/tr><tr><td>Focal length<\/td><td>900 mm (f\/10)<\/td><\/tr><tr><td>Focuser<\/td><td>1.25 inches<\/td><\/tr><tr><td>Execution<\/td><td>Optical Tube Assembly (OTA)<\/td><\/tr><tr><td>Supplied eyepiece<\/td><td>SP 26 mm<\/td><\/tr><tr><td>Special feature<\/td><td>Including sun filters and lens hood<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"<p><strong>This is just the tube (OTA), without mounting and tripod.<\/strong> You can choose the appropriate mounting and the accessories that come with it below.<\/p>\n<p>The Bresser AC 90\/900 Messier OTA comes with achromatic optics, an SP 26 mm eyepiece, a 6\u00d730 finder scope, a 90-degree star diagonal, an integrated dew shield, Vixen-style tube rings, solar filters, and a smartphone camera adapter.<\/p>","protected":false},"featured_media":96602,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[128],"product_cat":[51,3175,567],"product_tag":[3352,3353],"class_list":["post-32351","product","type-product","status-publish","has-post-thumbnail","product_brand-bresser","product_cat-telescopen","product_cat-refractor-ota","product_cat-refractor-telescopen","product_tag-sterrenkijker","product_tag-sterrenkijkers","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":[32525,90489,30599,25659,26969,32527,29247,24780,13594],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":32335,"url":"https:\/\/www.telescoop.nl\/en\/bresser-messier-ac-90-1200-messier-ota\/","url_meta":{"origin":32351,"position":0},"title":"Bresser Messier AC 90\/1200 Messier OTA","author":"Info telescoop","date":"02-11-2025","format":false,"excerpt":"This is just the tube (OTA), without the mounting and tripod. You can choose the appropriate mounting and the accessories that come with it below. The Bresser AC 90\/1200 Messier OTA comes with achromatic optics, integrated dew cap, SP 26 mm eyepiece, 6\u00d730 viewfinder, 90-degree star diagonal, Vixen-style tube rings and solar filters.","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-AC-90-1200-Telescoop-Messier-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":32304,"url":"https:\/\/www.telescoop.nl\/en\/bresser-messier-127l-1200-refractor-hexafoc-ota\/","url_meta":{"origin":32351,"position":1},"title":"Bresser Messier 127L\/1200 Refractor Hexafoc OTA","author":"","date":"02-11-2025","format":false,"excerpt":"This is the tube (OTA) only, without mounting and tripod. A suitable mounting and the accessories that come with it can be selected below. 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