{"id":92373,"date":"2026-01-04T19:28:25","date_gmt":"2026-01-04T18:28:25","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=92373"},"modified":"2026-07-17T15:58:43","modified_gmt":"2026-07-17T13:58:43","slug":"omegon-pronewton-n-254-1250-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-pronewton-n-254-1250-ota\/","title":{"rendered":"Omegon ProNewton N 254\/1250 OTA - 254mm Newton"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\">Omegon ProNewton N 254\/1250 OTA 254mm Newtonian: 10-inch with fan and fine focus<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Omegon ProNewton N 254\/1250<\/strong> is the largest ProNewton tube: 254 mm BK7 mirror with 94 percent reflection, a primary mirror fan with battery compartment and a 2-inch Crayford focuser with 1:10 reduction. Ten inches of aperture means globular clusters break down into stars and galaxies show structure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The thin spider vanes of the secondary mirror holder keep diffraction low: stars remain sharp and contrast high.<\/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-Telescoop-ProNewton-N-254-1250-OTA-5.jpg\" alt=\"Omegon ProNewton N 254\/1250 Newton Telescope Tube\" 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-Telescoop-ProNewton-N-254-1250-OTA-2.jpg\" alt=\"The 2-inch Crayford focuser with 1:10 reduction of the ProNewton 254\" 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\">Ventilator 1:10: the details that matter<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The built-in fan quickly brings the large mirror to ambient temperature, so the image is at its sharpest sooner. The 1:10 fine focus makes precise focusing routine, even for photography. The 8x50 optical finder, extension tube, and 1.25\/2 inch adapter are included.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Count on a sturdy mount in the EQ6 class; this tube rewards stability with higher class images.<\/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>Newtonian optics 254\/1250 with BK7 mirror (94 percent reflectivity)<\/li>\n\n\n<li>Main mirror fan with battery compartment<\/li>\n\n\n<li>2 inch Crayford focuser with 1:10 reduction and 1.25\/2 inch adapter<\/li>\n\n\n<li>8x50 finder scope<\/li>\n\n\n<li>Scope rings with dovetail mount<\/li>\n\n\n<li>Verlenhuls<\/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 laser collimator (\u20ac44.90) keeps the mirrors aligned; every Newtonian telescope should have one in its drawer. An Omegon 13% 2-inch moon filter (\u20ac34.90) dims the very bright Moon. The Omegon Pro UHC 2-inch filter (\u20ac89) brings out nebulae, and the Omegon UWA 9mm eyepiece (\u20ac59) provides a 139x magnification with a wide-angle view.<\/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\">Suitable for: advanced observers and photographers with heavy mounts who want 10-inch performance in a trackable setup. Not suitable for: visual observers without a heavy mount; the ProDob 254 has the same aperture class as complete Dobsonians. Compare on the <a href=\"\/en\/telescopes\/dobsonian-telescopes\/\">Dobson page<\/a>. Are you 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>254 mm<\/td><\/tr><tr><td>Focal length<\/td><td>1250 mm<\/td><\/tr><tr><td>Opening ratio<\/td><td>f\/4,9<\/td><\/tr><tr><td>Optical design<\/td><td>Newton reflector, BK7 mirror with 94 percent reflection<\/td><\/tr><tr><td>Focuser<\/td><td>2 inch Crayford with 1:10 reduction<\/td><\/tr><tr><td>Ventilator<\/td><td>Main mirror fan with battery compartment<\/td><\/tr><tr><td>Seeker<\/td><td>Optical 8x50<\/td><\/tr><tr><td>Execution<\/td><td>OTA (loose tube)<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"<p>The Omegon ProNewton N 254\/1250 comes with a 2-inch Crayford focuser with 1:10 reduction, tube rings, 1.25\/2-inch adapter, 8x50 finder scope, fan with battery compartment, dovetail, and extension tube.<\/p>","protected":false},"featured_media":98782,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[51,428,531,3188,2972],"product_tag":[],"class_list":["post-92373","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-losse-buizen","product_cat-reflector-telescopen","product_shipping_class-licht","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":[93307,24832,25035,16695],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":92243,"url":"https:\/\/www.telescoop.nl\/en\/omegon-prodob-n-254-1250-dobson-dob-ii\/","url_meta":{"origin":92373,"position":0},"title":"Omegon ProDob N 254\/1250 Dobson","author":"Info telescoop","date":"04-01-2026","format":false,"excerpt":"De Omegon ProDob N 254\/1250 wordt geleverd met 2 inch Crayford-focuser met 1:10 reductie, SWA 32 mm oculair, Deluxe LED-zoeker, hoofdspiegelventilator, premium frictiesysteem en houten rockerbox met oculairhouder.","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-Dobson-telescoop-ProDob-N-254-1250-DOB-II-6.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92254,"url":"https:\/\/www.telescoop.nl\/en\/omegon-prodob-n-254-1250-dob-ii-with-radiant\/","url_meta":{"origin":92373,"position":1},"title":"Omegon ProDob N 254\/1250 DOB II Radiant","author":"Info telescoop","date":"04-01-2026","format":false,"excerpt":"The Omegon ProDob N 254\/1250 DOB II Radiant comes with a 2-inch Crayford focuser with 1:10 reduction, SWA 32mm eyepiece, Radiant finder, primary mirror fan, adjustable friction system, and wooden rocker box.","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-Dobson-telescoop-ProDob-N-254-1250-DOB-II-with-radiant-6.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":16098,"url":"https:\/\/www.telescoop.nl\/en\/omegon-advanced-x-n-254-1250-dobson\/","url_meta":{"origin":92373,"position":2},"title":"Omegon Advanced X N 254\/1250 Dobson","author":"Info telescoop","date":"18-07-2025","format":false,"excerpt":"The Omegon Advanced X N 254\/1250 comes with a parabolic primary mirror (94% coating), a built-in mirror fan, a 2-inch Crayford focuser, a 25 mm Pl\u00f6ssl eyepiece, an 8x50 finder scope, and an accessory tray.","rel":"","context":"With 1 comment","block_context":{"text":"With 1 comment","link":"https:\/\/www.telescoop.nl\/en\/omegon-advanced-x-n-254-1250-dobson\/#comments"},"img":{"alt_text":"Omegon Dobson Teleskop Advanced X N 254\/1250","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-254-1250.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-254-1250.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-254-1250.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-254-1250.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Dobson-telescoop-Advanced-X-N-254-1250.jpg?resize=1050%2C600&ssl=1 3x, 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zwaluwstaart: de veelzijdige instap in de ProNewton-lijn.","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-Telescoop-ProNewton-N-153-750-OTA-3.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":92367,"url":"https:\/\/www.telescoop.nl\/en\/omegon-pronewton-n-203-1000-ota\/","url_meta":{"origin":92373,"position":5},"title":"Omegon ProNewton N 203\/1000 OTA","author":"Info telescoop","date":"04-01-2026","format":false,"excerpt":"De Omegon ProNewton N 203\/1000 wordt geleverd met metalen Newton-tubus, 2 inch Crayford-focuser, red dot-zoeker, buisringen, 1,25\/2 inch adapter en Vixen-stijl zwaluwstaart: de 8 inch allrounder als losse buis.","rel":"","context":"Similar post","block_context":{"text":"Similar 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