{"id":92206,"date":"2026-01-03T18:26:52","date_gmt":"2026-01-03T17:26:52","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=92206"},"modified":"2026-03-03T20:22:49","modified_gmt":"2026-03-03T19:22:49","slug":"omegon-pro-rc-355-2845-ota","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-rc-355-2845-ota\/","title":{"rendered":"Omegon Pro RC 355\/2845 - Ritchey-Chretien Truss OTA"},"content":{"rendered":"

Omegon Pro RC 355\/2845 Telescope -<\/strong> Professional astrophotography at your fingertips<\/strong>
The Omegon Pro RC 355\/2845 is a Ritchey-Chr\u00e9tien telescope designed for serious observatories and ambitious astrophotographers. It delivers an extremely sharp image over a wide field of view. That means stars and nebulae remain bright and spot-on all the way to the edge of your image, with no distortion.<\/p>\n\n\n\n

Sharpness that remains<\/strong>
The hyperbolic quartz mirrors keep focus stable even during long exposures. That way you don't have to constantly adjust. With a reflectivity of 92-94%, you'll see high-contrast stars and deep nebulae like you've never seen before.<\/p>\n\n\n\n

\"Omegon<\/figure>\n\n\n\n

Bright and large field<\/strong>
With a 355 mm main mirror, you catch a lot of light. That gives bright images of galaxies, nebulae and clusters. Thanks to the RC design, you don't need a corrector. Everything stays sharp, from the center to the edge of the image.<\/p>\n\n\n\n

Fast cooling, less turbulence<\/strong>
The open carbon gitter tube allows air to flow freely. This eliminates hot layers of air that blur your image. The built-in fan cools the main mirror up to 50% faster, so you can start observing or photographing faster.<\/p>\n\n\n\n

Flexible and sturdy focuser<\/strong>
The 3\u2033 Crayford focuser with ball bearings offers plenty of room for large CCD cameras. It is fully rotatable, accurately adjustable with 1:10 reduction and remains stable, so your camera is always exactly on the optical axis. No tilting, no vignetting, just perfect sharpness.<\/p>\n\n\n\n

\"Omegon<\/figure>\n\n\n\n

Better images than an SC telescope<\/strong>
No corrector plate means no internal reflections. The telescope heats up faster and transmits brighter light. RC telescopes are the standard in professional observatories - now available to you, too.<\/p>\n\n\n\n

Ease of use in your observatory<\/strong>
Despite its professional design, the Omegon RC 355\/2845 is surprisingly easy to handle. Light, rigid and thermally stable. Ideal for large cameras and long exposures.<\/p>\n\n\n\n

What we recommend<\/strong>
\u2713 Nebulae & galaxies: excellent
\u2713 Astrophotography: top quality
\u2717 Moon & Planets: not ideal because of long focal length
\u2717 Nature observation: not suitable
\u2717 Sun: only with special sun filters<\/p>\n\n\n\n

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

Optics<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Type<\/td>Reflector<\/td><\/tr>
Design<\/td>Ritchey-Chr\u00e9tien<\/td><\/tr>
Aperture (mm)<\/td>355<\/td><\/tr>
Focal length (mm)<\/td>2845<\/td><\/tr>
Aperture ratio (f\/)<\/td>8<\/td><\/tr>
Resolution<\/td>0,32\u2033<\/td><\/tr>
Limit value (mag)<\/td>15,25<\/td><\/tr>
Light output<\/td>2571\u00d7<\/td><\/tr>
Max. useful magnification<\/td>700\u00d7<\/td><\/tr>
Tube weight (kg)<\/td>28,3<\/td><\/tr>
Tube length (mm)<\/td>990<\/td><\/tr>
Tube material<\/td>Carbon<\/td><\/tr>
Tube diameter (mm)<\/td>483<\/td><\/tr>
Tube construction<\/td>Open tube<\/td><\/tr>
Coating<\/td>Aluminum & silicon dioxide<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Reflector<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Head mirror design<\/td>Hyperbolic<\/td><\/tr>
Front mirror material<\/td>Quartz<\/td><\/tr>
Catch mirror obstruction<\/td>47%<\/td><\/tr>
Main mirror material<\/td>Quartz<\/td><\/tr>
Capture mirror diameter (mm)<\/td>166<\/td><\/tr>
Reflectivity<\/td>94%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Focuser<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Design<\/td>Monorail 3\u2033<\/td><\/tr>
Ocular connection<\/td>3\u2033<\/td><\/tr>
Reduction<\/td>1:10 finesse<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Mount<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Type of mount<\/td>Without mount<\/td><\/tr>
Design<\/td>OTA<\/td><\/tr>
GoTo steering<\/td>No<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Included accessories<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Dovetail<\/td>Losmandy-Style<\/td><\/tr>
Extensions<\/td>Yes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

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

Feature<\/th>Description<\/th><\/tr><\/thead>
Series<\/td>Pro RC<\/td><\/tr>
Application<\/td>Nebulae & galaxies<\/td><\/tr>
Astrophotography<\/td>Yes<\/td><\/tr>
Recommended for<\/td>Advanced<\/td><\/tr>
Observatories<\/td>Yes<\/td><\/tr>
Moon & Planets<\/td>No<\/td><\/tr>
Nature observation<\/td>No<\/td><\/tr>
Sun<\/td>Not recommended (only with appropriate sunscreens)<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

Omegon Pro RC 355\/2845 Telescope<\/span>\u00a0Comes with open carbon truss-tube, hyperbolic quartz mirrors with honeycomb structure, 3\u2033 monorail focuser, powerful fans, extensions and Losmandy swallowtail - ideal for advanced astrophotographers in observatories desiring absolute sharpness and thermal stability.<\/span> \u00a0<\/span><\/p>","protected":false},"featured_media":98678,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[51,531],"product_tag":[],"class_list":["post-92206","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-telescopen","product_cat-gevorderd","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":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":92196,"url":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-newton-355-2845-lichtgewicht-truss-ota\/","url_meta":{"origin":92206,"position":0},"title":"Omegon 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