{"id":91980,"date":"2026-01-02T18:17:28","date_gmt":"2026-01-02T17:17:28","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=91980"},"modified":"2026-07-17T16:00:11","modified_gmt":"2026-07-17T14:00:11","slug":"omegon-pro-104-650-apo-refractor-ota-field-flattener","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/omegon-pro-104-650-apo-refractor-ota-field-flattener\/","title":{"rendered":"Omegon Pro 104\/650 APO Refractor OTA + 2\" Field Flattener"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\">Omegon Pro 104\/650 APO Refractor OTA + 2\" Field Flattener: The Flagship, Fully Corrected<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Omegon Pro APO AP 104\/650 with Field Flattener<\/strong> is the complete execution of the 104 mm triplet: the same OHARA lens with FPL-53 and FPL-51 elements, but with a matching 2-inch field flattener, 1.25\/2-inch adapter, and aluminum carrying case included. Unpack, set up, photograph: the field is flat right to the corners.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An apochromat converges all colors to a focal point. Stars remain white and point-like, without the purple edges of simple lenses: precisely what a camera sensor would mercilessly reveal.<\/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-Apochromatische-refractor-Pro-APO-AP-104-650-ED-OTA-2-Field-Flattener-14.jpg\" alt=\"Omegon Pro APO AP 104\/650 with 2-inch field flattener\" 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-Apochromatische-refractor-Pro-APO-AP-104-650-ED-OTA-2-Field-Flattener-15.jpg\" alt=\"The 2.9-inch dual-speed focuser of the Omegon AP 104\/650\" 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\">2.9-inch dual speed with flattener on the train<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The hybrid focuser carries the flattener plus camera without slipping and focuses at the micrometer level via the 1:10 reduction. Because the flattener is calculated for this lens, corner stars remain round, even on full format.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compared to mirror systems, the unobstructed light path provides more contrast for fine detail differences, which is precisely what makes nebulae structures and dust lanes visible.<\/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>Air-separated triplet 104\/650 with FPL-53 and FPL-51 (OHARA)<\/li>\n\n\n<li>Matching 2-inch field flattener<\/li>\n\n\n<li>2.9 inch dual speed focuser<\/li>\n\n\n<li>1.25\/2 inch adapter<\/li>\n\n\n<li>Aluminum transport case<\/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) screws into the imaging train for nebulae photography, and the Omegon Powerbank 10k 12V (39.90 euros) powers the complete setup all night long.<\/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\">For: advanced astrophotographers who want a complete flagship: optics, corrector, and case in one purchase. Not for: those who already have the corrector; the bare 104mm Triplet is two hundred euros cheaper. Doubting between 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>104 mm<\/td><\/tr><tr><td>Focal length<\/td><td>650 mm<\/td><\/tr><tr><td>Opening ratio<\/td><td>f\/6.25<\/td><\/tr><tr><td>Optical design<\/td><td>Air-spaced triplet with FPL-53 and FPL-51<\/td><\/tr><tr><td>Corrector<\/td><td>Matching 2-inch field flattener<\/td><\/tr><tr><td>Focuser<\/td><td>2.9 inch dual speed, 1:10<\/td><\/tr><tr><td>Execution<\/td><td>OTA with roller skates and a suitcase<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"<p>The Omegon Pro APO AP 104\/650 comes with an FPL-53\/FPL-51 triplet objective, 2.9-inch dual-speed focuser, field flattener, 1.25\/2-inch adapter, and aluminum carrying case: the fully corrected flagship.<\/p>","protected":false},"featured_media":98509,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[126],"product_cat":[51,428,3175,567],"product_tag":[],"class_list":["post-91980","product","type-product","status-publish","has-post-thumbnail","product_brand-omegon","product_cat-telescopen","product_cat-telescopen-voor-astrofotografie","product_cat-refractor-ota","product_cat-refractor-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":[25035,93445],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":16234,"url":"https:\/\/www.telescoop.nl\/en\/omegon-104mm-triplet-refractor-astrofotografie\/","url_meta":{"origin":91980,"position":0},"title":"Omegon 104 mm Triplet Refractor","author":"Info telescoop","date":"23-07-2025","format":false,"excerpt":"De Omegon 104 mm Triplet biedt een luchtgescheiden FPL-53\/FPL-51 objectief, 650 mm brandpunt en een 2,9 inch focuser met M74: professionele volformaat-astrofotografie in de kaalste, scherpst geprijsde vorm.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"omegon Apochromatisches Teleskop 104mm Triplett f\u00fcr Astrofotografie","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Apochromatische-refractor-Pro-APO-AP-104-650-ED-Triplet-OTA.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Apochromatische-refractor-Pro-APO-AP-104-650-ED-Triplet-OTA.jpg?resize=350%2C200&ssl=1 1x, 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ED Carbon met Field Flattener wordt geleverd met FPL-53 optiek, bijpassende 2 inch flattener, carbon tubus, Power Linear Crayford-focuser en aluminium koffer: volledig vlak beeld op volformaat.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Omegon 80\/500 Pro APO ED Carbon OTA + Field Flattener","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Apochromatische-refractor-Pro-APO-AP-80-500-ED-Carbon-OTA-Field-Flattener.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Apochromatische-refractor-Pro-APO-AP-80-500-ED-Carbon-OTA-Field-Flattener.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/07\/Omegon-Apochromatische-refractor-Pro-APO-AP-80-500-ED-Carbon-OTA-Field-Flattener.jpg?resize=525%2C300&ssl=1 1.5x, 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