{"id":92196,"date":"2026-01-03T18:15:29","date_gmt":"2026-01-03T17:15:29","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=92196"},"modified":"2026-09-10T14:45:43","modified_gmt":"2026-09-10T12:45:43","slug":"omegon-pro-newton-355-2845-lightweight-truss-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-pro-newton-355-2845-lichtgewicht-truss-ota\/","title":{"rendered":"Omegon Pro Newton 355\/2845 Lightweight Truss OTA"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\">Omegon Pro RC 355\/2845 Lightweight Truss OTA: 14 inch with minimal mirror mass<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Omegon Pro RC 355\/2845 Lightweight Truss<\/strong> tilts the RC scope to 14 inches and keeps the weight manageable: the quartz honeycomb primary mirror reaches thermal equilibrium faster and puts significantly less strain on the mount than solid glass of this size. Coma-free on large-format sensors, without a corrector.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Ritchey-Chr\u00e9tien uses two hyperbolic mirrors: the design of virtually every professional observatory. The result is a large, coma-free field of view without a corrector: stars remain round all the way to the edges of the sensor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The open carbon truss construction is the recipe of professional observatories: rigid, light, and thermally stable, with natural ventilation that prevents its own microclimate inside the tube. The built-in 12V fan cools the primary mirror up to twice as fast, so you're working at full sharpness sooner.<\/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-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Ritchey-Chretien-Pro-RC-355-2845-lichtgewicht-truss-OTA-5.jpg\" alt=\"Omegon Pro RC 355\/2845 Lightweight Truss Ritchey-Chr\u00e9tien\" 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\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Ritchey-Chretien-Pro-RC-355-2845-lichtgewicht-truss-OTA-3.jpg\" alt=\"The 3-inch monorail focuser of the Omegon RC 355 truss\" title=\"\"><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<h4 class=\"wp-block-heading\">Observatory-grade precision<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The ball-bearing 3-inch monorail focuser illuminates large-format image fields without vignetting, the fan system quickly brings the large primary mirror to ambient temperature, and the precision collimation keeps both hyperbolic mirrors exactly aligned.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Three extension tubes adjust the backfocus on any camera configuration; the Losmandy dovetail belongs on an observatory mount.<\/p>\n<\/div>\n<\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Included<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ritchey-Chr\u00e9tien optics 355\/2845 with hyperbolic quartz mirrors<\/li>\n\n\n<li>Quartz honeycomb primary mirror<\/li>\n\n\n<li>Open carbon truss tube<\/li>\n\n\n<li>3 inch monorail focuser<\/li>\n\n\n<li>Ventilation system<\/li>\n\n\n<li>Three extensions<\/li>\n\n\n<li>Precision collimation mechanism<\/li>\n\n\n<li>Losmandy dovetail<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Featured accessories<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The Omegon Pro UHC 2-inch filter (89 euros) brings out emission nebulae and the Omegon Powerbank 10k 12V (39.90 euros) powers fans and camera on location.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">For whom yes, for whom no<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Pros: observatories that want to go to 14 inches without having to move to a heavier mount class. Cons: anyone putting budget first; the standard RC 355\/2845 Truss delivers the same aperture class for two thousand euros less. Hesitating between the models? The <a href=\"\/en\/telescope-selection-aid\/\">Choice assistant<\/a> helpt. More Omegon is on the <a href=\"\/en\/brands\/omegon\/\">merk page<\/a>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Specifications<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Opening<\/td><td>355 mm<\/td><\/tr><tr><td>Focal length<\/td><td>2845 mm<\/td><\/tr><tr><td>Opening ratio<\/td><td>f\/8<\/td><\/tr><tr><td>Optical design<\/td><td>Ritchey-Chr\u00e9tien (hyperbolic quartz mirrors)<\/td><\/tr><tr><td>Main mirror<\/td><td>Honeycomb quartz<\/td><\/tr><tr><td>Tubus<\/td><td>Open carbon truss<\/td><\/tr><tr><td>Focuser<\/td><td>3-inch monorail<\/td><\/tr><tr><td>Ventilator<\/td><td>Ventilation system<\/td><\/tr><tr><td>Execution<\/td><td>OTA (loose tube)<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"<p>The Omegon Pro RC 355\/2845 Lightweight Truss comes with an open carbon truss tube, quartz honeycomb primary mirror, 3-inch monorail focuser, fan system, Losmandy dovetail, three extension tubes, and precision collimation.<\/p>","protected":false},"featured_media":98669,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[51,428,3259,3164,2972],"product_tag":[],"class_list":["post-92196","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-telescopen","product_cat-telescopen-voor-astrofotografie","product_cat-gevorderd","product_cat-reflector-ota","product_cat-reflector-telescopen","product_shipping_class-telescoop","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":[25035,93445],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":92206,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-rc-355-2845-ota\/","url_meta":{"origin":92196,"position":0},"title":"Omegon Pro RC 355\/2845 - Ritchey-Chretien Truss OTA","author":"Info telescoop","date":"03-01-2026","format":false,"excerpt":"De Omegon Pro RC 355\/2845 Truss wordt geleverd met open carbon truss-tubus, hyperbolische kwartsspiegels met honingraatstructuur, 3 inch monorail focuser, krachtige ventilators, verlengstukken en Losmandy-zwaluwstaart.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Ritchey-Chretien-Pro-RC-355-2845-Truss-OTA-5.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92172,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-newton-304-2432-lichtgewicht-truss-ota\/","url_meta":{"origin":92196,"position":1},"title":"Omegon Pro Newton 304\/2432 Lightweight Truss OTA","author":"","date":"03-01-2026","format":false,"excerpt":"The Omegon Pro RC 304\/2432 Lightweight Truss comes with an open carbon truss tube, hyperbolic quartz mirrors, a honeycomb primary mirror, a 3-inch monorail focuser, a fan, three extension tubes, and a Losmandy dovetail.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Pro RC 304\/2432 Ritchey-Chr\u00e9tien telescoop met lichtgewicht truss","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Ritchey-Chretien-Pro-RC-304-2432-lichtgewicht-truss-OTA-7.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92214,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-newton-406-3250-lichtgewicht-truss-ota\/","url_meta":{"origin":92196,"position":2},"title":"Omegon Pro Newton 406\/3250 Lightweight Truss OTA","author":"Info telescoop","date":"03-01-2026","format":false,"excerpt":"The Omegon Pro RC 406\/3250 Lightweight Truss comes with an open carbon truss tube, quartz honeycomb primary mirror, 3-inch monorail focuser, powerful fan, Losmandy dovetail, three extension tubes, and adjustable mirror cell.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Ritchey-Chretien-Pro-RC-406-3250-lichtgewicht-truss-OTA-7.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92182,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-newton-304-2432-truss-ota\/","url_meta":{"origin":92196,"position":3},"title":"Omegon Pro Newton 304\/2432 Truss OTA","author":"","date":"03-01-2026","format":false,"excerpt":"The Omegon Pro RC 304\/2432 Truss comes with an open carbon truss tube, hyperbolic quartz mirrors, a 3-inch monorail focuser, fan, three extension tubes, an adjustable mirror cell, and a Losmandy dovetail.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Ritchey-Chretien-Pro-RC-304-2432-Truss-OTA-10.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92224,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-rc-406-3250-truss-ota\/","url_meta":{"origin":92196,"position":4},"title":"Omegon Pro RC 406\/3250 Truss OTA - 406mm Ritchey-Chr\u00e9tien","author":"Info telescoop","date":"03-01-2026","format":false,"excerpt":"The Omegon Pro RC 406\/3250 Truss comes with an open carbon truss tube, quartz honeycomb primary mirror, 3-inch monorail focuser, powerful fan, extension tubes, and Losmandy dovetail: 16 inches for the sharpest price.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Ritchey-Chretien-Pro-RC-406-3250-Truss-OTA-4.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92127,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pro-rc-250-2000-ota\/","url_meta":{"origin":92196,"position":5},"title":"Omegon Pro RC 250\/2000 OTA","author":"","date":"03-01-2026","format":false,"excerpt":"De Omegon Pro RC 250\/2000 wordt geleverd met 3 inch roteerbare focuser, hyperbolische kwartsspiegels, Losmandy-zwaluwstaart, tilt-adapter, ge\u00efntegreerde baffles en carbonbuis: de grootste RC met volle buis.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon Pro RC 250\/2000 Carbon OTA Ritchey-Chr\u00e9tien telescoop met volledige buis","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Carbon-Volledige-buis-Ritchey-Chretien-Pro-RC-250-2000-OTA-6.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/92196","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=92196"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/98669"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=92196"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=92196"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=92196"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=92196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}