{"id":107792,"date":"2026-04-29T20:02:28","date_gmt":"2026-04-29T18:02:28","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=107792"},"modified":"2026-09-10T14:38:57","modified_gmt":"2026-09-10T12:38:57","slug":"televue-np-101is-101-540-apochromatic-refractor","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/televue-np-101is-101-540-apochromat-refractor\/","title":{"rendered":"TeleVue NP-101is \u2013 101\/540 Apochromatic Refractor"},"content":{"rendered":"<h2 class=\"wp-block-heading has-text-align-center\"><strong>Nagler-Petzval: flat field without a flattener<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>TeleVue NP-101is<\/strong> is a premium apochromat for demanding astrophotographers and experienced observers. The four-lens Nagler-Petzval design in two ED groups delivers a flat, almost completely chromatic aberration-free image field at 101mm aperture and 540mm focal length (f\/5.3), without a separate field flattener.<\/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 fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" data-id=\"107800\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3.jpg\" alt=\"TeleVue NP-101 apochromatic refractor, full-frame\" class=\"wp-image-107800\" title=\"\" srcset=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3.jpg 800w, https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3-300x300.jpg 300w, https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3-150x150.jpg 150w, https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3-768x768.jpg 768w, https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3-12x12.jpg 12w, https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3-441x441.jpg 441w, https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3-100x100.jpg 100w, https:\/\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-101-540-NP-101is-Imaging-System-OTA-3-64x64.jpg 64w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Imaging System Execution<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">This is the photographically optimized version: the high-quality fine-focus focuser is motor-ready for the focusing accuracy required by high-resolution photography. Stars remain sharp to the edge, even on larger sensors. Visually, the tube delivers razor-sharp images of the Moon and planets, as well as wide, high-contrast star fields. A magnification of up to approximately 200x is realistically meaningful.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>In the box<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Optical tube NP-101 is a 101\/540 Nagler-Petzval quadruplet<\/li>\n\n\n\n<li>Imaging System - focuser, prepared for motorization<\/li>\n\n\n\n<li>Tube Rings<\/li>\n\n\n\n<li>Transport case<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Featured accessories<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-accessories\/astro-photography\/other-astrophotography-accessories\/\">TeleVue PMT-4201 T-Ring Adapter<\/a> (99 euro) connects your camera directly to the Imaging System rear.<\/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 astrophotographers who want a corrected Petzval field with TeleVue mechanics, also excellent visually. Not for those seeking maximum aperture; the NP127is offers the same concept with 127 mm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Specifications<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Optical design<\/td><td>Nagler-Petzval quadruplet, two ED groups<\/td><\/tr><tr><td>Opening<\/td><td>101 mm<\/td><\/tr><tr><td>Focal length<\/td><td>540 mm<\/td><\/tr><tr><td>Opening ratio<\/td><td>f\/5.3<\/td><\/tr><tr><td>Focuser<\/td><td>Imaging System, prepared for motorization<\/td><\/tr><tr><td>Field of view<\/td><td>Train, without loose flatterer<\/td><\/tr><tr><td>Execution<\/td><td>OTA (loose tube)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Are you unsure about the right tube for your needs? The <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-selection-aid\/\">telescope selection aid<\/a> helps you choose. Also view all <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/refracting-telescopes\/\">Refracting telescopes<\/a> and the full range of <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/televue\/\">TeleVue<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>TeleVue NP-101is: Nagler-Petzval quadruplet 101\/540 f\/5.3 with a flat field of view without a flattener and a motorizable Imaging System focuser. Supplied with tube rings and carrying case.<\/p>","protected":false},"featured_media":107800,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[1551],"product_cat":[51,428,3175,567],"product_tag":[],"class_list":["post-107792","product","type-product","status-publish","has-post-thumbnail","product_brand-televue","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":[107111],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":107713,"url":"https:\/\/www.telescoop.nl\/en\/televue-reducer-0-8x-npr-focal-reducer\/","url_meta":{"origin":107792,"position":0},"title":"TeleVue Reducer 0.8x NPR \u2013 Focal Reducer","author":"Abdullah Ibrar","date":"29-04-2026","format":false,"excerpt":"NPR 0.8x reducer for the photographic TeleVue NP101is and NP127is refractors.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Reducer 0.8x NPR close-up van de frontlens en zwarte behuizing van de TeleVue Imaging System 0.8x reducer voor Nagler-Petzval telescopen","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-0-8x-NPR-3.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-0-8x-NPR-3.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-0-8x-NPR-3.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-0-8x-NPR-3.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":107653,"url":"https:\/\/www.telescoop.nl\/en\/televue-grote-beeldveldegalisator\/","url_meta":{"origin":107792,"position":1},"title":"TeleVue Large Field Flattener NP101\/NP101is\/NP127is \u2013 Field Corrector","author":"Abdullah Ibrar","date":"29-04-2026","format":false,"excerpt":"Large field flattener for TeleVue NP refractors when using large sensors.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Grote beeldveldegalisator, voor Tele Vue NP101\/NP101is\/NP127is grootbeeldveld flattener\/field flattener corrector met multicoating in zwarte behuizing op witte achtergrond","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Grote-beeldveldegalisator-voor-Tele-Vue-NP101-NP101is-NP127is.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Grote-beeldveldegalisator-voor-Tele-Vue-NP101-NP101is-NP127is.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Grote-beeldveldegalisator-voor-Tele-Vue-NP101-NP101is-NP127is.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Grote-beeldveldegalisator-voor-Tele-Vue-NP101-NP101is-NP127is.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":107778,"url":"https:\/\/www.telescoop.nl\/en\/televue-tvnp127is-127-660-apochromat-refractor\/","url_meta":{"origin":107792,"position":2},"title":"TeleVue TVNP127is \u2013 127\/660 Apochromatic Refractor","author":"Abdullah Ibrar","date":"29-04-2026","format":false,"excerpt":"TeleVue NP127is: four-element Petzval apochromat 127\/660 f\/5.2 of absolute top class, flat field to full-frame and field of view up to 4.4 degrees. Supplied with transport cases and 2 to 2.4-inch adapter.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Apochromatische refractor AP 127\/660 TVNP127is OTA complete OTA refractortelescoop met 2,4 inch focuser, accessoires en TeleVue transportkoffer, inclusief detail van adapterringen","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-127-660-TVNP127is-OTA-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-127-660-TVNP127is-OTA-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-127-660-TVNP127is-OTA-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Apochromatische-refractor-AP-127-660-TVNP127is-OTA-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":107664,"url":"https:\/\/www.telescoop.nl\/en\/televue-trf-2008-08x-reducer-veldcorrector\/","url_meta":{"origin":107792,"position":3},"title":"TeleVue TRF-2008 0.8x \u2013 Reducer\/Field Corrector","author":"Abdullah Ibrar","date":"29-04-2026","format":false,"excerpt":"TRF-2008 reducer\/flattener 0.8x for TeleVue doublets with a focal length of 400 to 600 mm.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Reducer\/beeldveldegalisator, 0,8x, voor 400-600mm refractors 0,8x reducer\/flattener met 2 inch insteekmaat en T2 (M42x0,75) schroefdraad aan camerazijde in zwarte behuizing op witte achtergrond","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-beeldveldegalisator-0-8x-voor-400-600mm-refractors.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-beeldveldegalisator-0-8x-voor-400-600mm-refractors.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-beeldveldegalisator-0-8x-voor-400-600mm-refractors.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-beeldveldegalisator-0-8x-voor-400-600mm-refractors.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":107669,"url":"https:\/\/www.telescoop.nl\/en\/televue-reducer-beeldveldegalisator-08x\/","url_meta":{"origin":107792,"position":4},"title":"TeleVue Reducer\/Field Flattener 0.8x TV-102 \u2013 Field Corrector","author":"Abdullah Ibrar","date":"29-04-2026","format":false,"excerpt":"0.8x reducer\/flattener specific for the TeleVue TV-102 refractor.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Reducer\/beeldveldegalisator, 0,8x, voor 102 telescopen 0,8x reducer\/flattener met multicoating in zwarte behuizing op witte achtergrond","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-beeldveldegalisator-0-8x-voor-102-telescopen.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-beeldveldegalisator-0-8x-voor-102-telescopen.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-beeldveldegalisator-0-8x-voor-102-telescopen.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Reducer-beeldveldegalisator-0-8x-voor-102-telescopen.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":107359,"url":"https:\/\/www.telescoop.nl\/en\/televue-nagler-type-7-14mm-82\/","url_meta":{"origin":107792,"position":5},"title":"TeleVue Nagler Type 7 14mm 82\u00b0 - 14 mm UWA Eyepiece","author":"Abdullah Ibrar","date":"21-04-2026","format":false,"excerpt":"TeleVue Nagler Type 7 14mm 82\u00b0 \u2013 14mm UWA Eyepiece comes with a 2\" barrel, collapsible eyeguard, and filter thread. High-quality wide-angle eyepiece with an 82\u00b0 field of view and 19mm eye relief, ideal for Dobsons and fast Newtonians.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"TeleVue Oculair Nagler Type 7 14mm 82\u00b0 close-up productfoto van het oculair met zwarte behuizing en 2 inch vatting","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Nagler-Type-7-14mm-82d.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Nagler-Type-7-14mm-82d.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Nagler-Type-7-14mm-82d.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Nagler-Type-7-14mm-82d.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Nagler-Type-7-14mm-82d.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/04\/TeleVue-Oculair-Nagler-Type-7-14mm-82d.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/107792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=107792"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/107800"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=107792"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=107792"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=107792"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=107792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}