{"id":92196,"date":"2026-01-03T18:15:29","date_gmt":"2026-01-03T17:15:29","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=92196"},"modified":"2026-03-04T16:20:35","modified_gmt":"2026-03-04T15:20:35","slug":"omegon-pro-newton-355-2845-lightweight-truss-ota","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-newton-355-2845-lichtgewicht-truss-ota\/","title":{"rendered":"Omegon Pro Newton 355\/2845 Lightweight Truss OTA"},"content":{"rendered":"

Omegon Pro RC 355\/2845 Telescope - Truss Carbon for professional astrophotography<\/strong>
The Omegon Pro RC 355\/2845 combines large-format mirrors with near-perfect image reproduction. Two hyperbolic mirrors deliver a large, coma-free field of view. Stars remain sharp and round to the edge of your sensor. Ideal for observatories and advanced astrophotographers with large CCD or DSLR cameras.<\/p>\n\n\n\n

Hyperbolic mirrors for razor-sharp images<\/strong>
The main and catch mirrors are hyperbolic, not spherical like Schmidt-Cassegrain mirrors. This gives a larger field of view and minimal distortion. Your stars remain sharp, even at the edges.<\/p>\n\n\n\n

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

Quartz mirrors for stable focus<\/strong>
Both mirrors are made of thermally stable quartz. The focus remains constant even during long exposures. This prevents blur and loss of detail.<\/p>\n\n\n\n

Fast thermal equilibrium<\/strong>
The honeycomb structure of the main mirror and open carbon-truss design allow the telescope to cool quickly. Powerful fans minimize tube seeding and prepare the optics for razor-sharp images faster.<\/p>\n\n\n\n

3\u2033 Linear Crayford focuser<\/strong>
Large sensors up to 60 mm fit without vignetting. The focuser is fully rotatable, with reduction to 2\u2033 and 1.25\u2033, 1:10 fine adjustment and scaling. Camera or eyepiece sits exactly on the optical axis with no tilting.<\/p>\n\n\n\n

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

Carbon truss with open gitter design<\/strong>
Light, rigid and thermally stable. Open design prevents microclimates and promotes ventilation. Perfect for long exposures and professional use.<\/p>\n\n\n\n

Better than an SC telescope<\/strong>
No corrector plate means no internal reflections and brighter images. RC telescopes adjust faster to ambient temperature and deliver superior contrast. Sharpness to the edge is guaranteed.<\/p>\n\n\n\n

What we recommend<\/strong>
\u2713 Deep-sky: large, coma-free image - ideal for galaxies and nebulae
\u2713 Astrophotography: suitable for large CCD and DSLR sensors
\u2713 Moon & Planets: less suitable for large field
\u2717 Sun: not suitable without filters
\u2717 Beginners: not recommended<\/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>
Opening<\/td>355 mm<\/td><\/tr>
Focal length<\/td>2845 mm<\/td><\/tr>
Opening ratio<\/td>f\/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>
Coating<\/td>Aluminum & silicon dioxide<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Tubus<\/strong><\/p>\n\n\n\n

Feature<\/th>Description<\/th><\/tr><\/thead>
Tube length<\/td>990 mm<\/td><\/tr>
Tube diameter<\/td>483 mm<\/td><\/tr>
Tube weight<\/td>27 kg<\/td><\/tr>
Construction<\/td>Open tube, carbon truss<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

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

Feature<\/th>Description<\/th><\/tr><\/thead>
Main mirror design<\/td>Hyperbolic<\/td><\/tr>
Main mirror material<\/td>Quartz<\/td><\/tr>
Front mirror material<\/td>Quartz<\/td><\/tr>
Capture mirror diameter<\/td>166 mm<\/td><\/tr>
Obstruction<\/td>47%<\/td><\/tr>
Reflectivity<\/td>94% aluminum oxide<\/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>
Reduction<\/td>1:10 finesse<\/td><\/tr>
Connection (camera side)<\/td>M77x0.75mm(f)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

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

Feature<\/th>Description<\/th><\/tr><\/thead>
Type<\/td>OTA (without mount)<\/td><\/tr>
GoTo steering<\/td>No<\/td><\/tr>
Included accessories<\/td>Dovetail Losmandy-Style, extensions<\/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>Astrophotography, Nebulae & galaxies<\/td><\/tr>
Moon & Planets<\/td>No<\/td><\/tr>
Nature observation<\/td>No<\/td><\/tr>
Sun<\/td>Not recommended (with filters only)<\/td><\/tr>
Recommended for<\/td>Advanced<\/td><\/tr>
Beginners<\/td>No<\/td><\/tr>
Observatories<\/td>Yes<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

Omegon Pro RC 355\/2845 Telescope<\/span>\u00a0Comes with open carbon truss tube, quartz honeycomb main mirror, 3\u2033 monorail focuser, fan system, Losmandy swallowtail, three extensions and precision collimation - for observatories and advanced astrophotographers working with large-format CCD cameras and desiring extremely sharp deep-sky images.<\/span><\/p>","protected":false},"featured_media":98669,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[51,531],"product_tag":[],"class_list":["post-92196","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-telescopen","product_cat-gevorderd","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":92206,"url":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-rc-355-2845-ota\/","url_meta":{"origin":92196,"position":0},"title":"Omegon 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