{"id":27894,"date":"2025-09-02T22:18:44","date_gmt":"2025-09-02T20:18:44","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=27894"},"modified":"2026-03-03T20:21:39","modified_gmt":"2026-03-03T19:21:39","slug":"askar-ap-203-1421-ota","status":"publish","type":"product","link":"https:\/\/staging.telescoop.nl\/en\/askar-ap-203-1421-ota\/","title":{"rendered":"Askar AP 203\/1421 OTA"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Askar AP 203\/1421 OTA is one of the largest apochromatic refractors currently available. With an aperture of 203 mm and a focal length of 1421 mm, this model belongs to the absolute top class for observatories and high-end astrophotography. The air-gap triplet lens, constructed of ED (extra-low dispersion) glass, almost completely corrects chromatic aberration and delivers images with extreme contrast, high resolution and natural color reproduction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Despite its size, the construction is practically designed. The CNC-machined tube features integrated extensions that allow switching between photography and visual observation, including the use of prisms and bino viewers. The solid construction and high-quality workmanship ensure stability and durability for long-term use in a fixed observatory.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The 3.5\u2033 rack-and-pinion focuser with 1:10 reduction offers a 100mm setting range and is compatible with most electronic focus motors. The anti-reflection coating and graduated scale allow you to focus extremely accurately, even with heavy cameras and filter wheels. The 360\u00b0 rotator with scale and sturdy locking screw makes it easy to precisely adjust your image frame.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The telescope comes with sturdy tube rings, a Losmandy swallowtail and a transport case. With a tube weight of 23.5 kg, a heavy-duty mount such as the Sky-Watcher EQ8-R (Pro or RH) is recommended for full performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Application<\/strong><br>The Askar AP 203\/1421 OTA is intended for advanced astrophotographers and professional observers who demand uncompromising performance. It is suitable for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Astrophotography of deep-sky objects such as nebulae, galaxies and globular clusters at maximum resolution.<\/li>\n\n\n\n<li>Planetary observations with extreme contrast and color neutrality.<\/li>\n\n\n\n<li>Fixed setups in observatories where stability and image quality are critical.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Specifications<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Optical design: refractor (apochromatic, triplet with air gap)<\/li>\n\n\n\n<li>Aperture: 203 mm<\/li>\n\n\n\n<li>Focal length: 1421 mm<\/li>\n\n\n\n<li>Aperture ratio: f\/7<\/li>\n\n\n\n<li>Resolution: 0.68\u2033<\/li>\n\n\n\n<li>Boundary magnitude: 13.3<\/li>\n\n\n\n<li>Max. useful magnification: 406x<\/li>\n\n\n\n<li>Light output: 840x relative to naked eye<\/li>\n\n\n\n<li>Tube weight: 23.5 kg<\/li>\n\n\n\n<li>Focuser: 3.5\u2033 rack &amp; pinion, 1:10 reduction, 100 mm range, rotatable 360\u00b0<\/li>\n\n\n\n<li>Free opening of focuser: 89 mm<\/li>\n\n\n\n<li>Ocular connection: 2\u2033 with adapter to 1.25\u2033<\/li>\n\n\n\n<li>Included: Tube rings, Losmandy swallowtail, accessory shoe (Vixen\/Sky-Watcher), transport case, dew cap, eyepiece adapter 2\u2033\/1.25\u2033<\/li>\n\n\n\n<li>Corrector: Not included (optionally available)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p data-start=\"281\" data-end=\"791\">\u00a0<\/p>\n<p data-start=\"122\" data-end=\"279\">Askar AP 203\/1421 OTA comes with tube rings, Losmandy swallowtail, adapters for 2\u2033 and 1.25\u2033, transport case and dew cap.<\/p>","protected":false},"featured_media":27899,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1542],"product_cat":[567,428,531,51],"product_tag":[],"class_list":["post-27894","product","type-product","status-publish","has-post-thumbnail","product_brand-askar","product_cat-refractors","product_cat-telescopen-voor-astrofotografie","product_cat-gevorderd","product_cat-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":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":27918,"url":"https:\/\/staging.telescoop.nl\/en\/askar-ap-40-180-fma180-ota\/","url_meta":{"origin":27894,"position":0},"title":"Askar AP 40\/180 FMA180 OTA","author":"Info telescoop","date":"02-09-2025","format":false,"excerpt":"\u00a0 Askar AP 40\/180 FMA180 OTA comes with integrated corrector, T2 connector, tube rings and dew cap.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Askar AP 40\/180 FMA180 OTA","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Askar-apochromatische-refractor-AP-40-180-FMA180-OTA.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Askar-apochromatische-refractor-AP-40-180-FMA180-OTA.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Askar-apochromatische-refractor-AP-40-180-FMA180-OTA.jpg?resize=525%2C300&ssl=1 1.5x, 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Triplet OTA","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Askar-Apochromatische-refractor-AP-160-1120-Triplet-OTA.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Askar-Apochromatische-refractor-AP-160-1120-Triplet-OTA.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Askar-Apochromatische-refractor-AP-160-1120-Triplet-OTA.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Askar-Apochromatische-refractor-AP-160-1120-Triplet-OTA.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/09\/Askar-Apochromatische-refractor-AP-160-1120-Triplet-OTA.jpg?resize=1050%2C600&ssl=1 3x, 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