{"id":90896,"date":"2025-12-03T11:17:16","date_gmt":"2025-12-03T10:17:16","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=90896"},"modified":"2026-10-13T11:15:02","modified_gmt":"2026-10-13T09:15:02","slug":"skywatcher-ap-100-550-esprit-100ed-apochromatic-refractor-professional-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/skywatcher-ap-100-550-esprit-100ed-apochromatische-refractor-professional-ota\/","title":{"rendered":"Skywatcher AP 100\/550 ESPRIT-100ED Apochromatic Refractor Professional OTA"},"content":{"rendered":"<h2>Sky-Watcher Esprit-100ED: the favorite of demanding photographers<\/h2>\n<p>The Sky-Watcher Esprit-100ED is a 100\/550mm (f\/5.5) apochromatic triplet with FPL-53 glass. Worldwide, it's one of the most acclaimed astrographs in its class: enough aperture for detail, short enough for wide fields, and with color correction that keeps bright stars clean down to the pixel level.<\/p>\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-100-550-ESPRIT-100ED-Apochromatische-Refractor-Professional-OTA-2.jpg\" alt=\"Sky-Watcher Esprit-100ED apochromatic triplet refractor\" class=\"wp-image-90897\" title=\"\"><\/figure>\n<h2>Why an Esprit?<\/h2>\n<p>The Esprit line is Sky-Watcher's professional astrophotography series: air-spaced triplets with premium glass, built to place flat, color-pure star fields onto a camera sensor. Stars remain points even in the corners, even with large sensors, and bright stars do not develop a purple halo. This is the class where optics make the difference between a nice and a publishable photo.<\/p>\n<h2>The golden mean of the Esprit line<\/h2>\n<p>A hundred-millimeter triplet at f\/5.5 is the final destination for many photographers: virtually every deep-sky target is achievable, from sprawling nebulae to more compact galaxies. The included 9x50 right-angle finder and 2-inch star diagonal also make the optical tube visually complete.<\/p>\n<h2>This is how to get the most out of this telescope<\/h2>\n<ul>\n<li><strong>Virtually no cooling time and no collimation:<\/strong> A refractor is ready within fifteen minutes, and the optics stay aligned. More time for photons.<\/li>\n<li><strong>The setup determines your photo result:<\/strong> Count on HEQ5-class or heavier for full photographic potential.<\/li>\n<li><strong>Plan to flatten me:<\/strong> For sharp stars all the way to the corners of your sensor, a field flattener is essential for a photographic refractor. Order it along with your initial purchase to avoid a second waiting period.<\/li>\n<li><strong>Dew control is essential with lenses:<\/strong> A dew cap or dew heater prevents the front lens from fogging up in the middle of a session.<\/li>\n<li><strong>Never look directly at the sun without protection.,<\/strong> not even for one photo: only with a certified solar filter in front.<\/li>\n<\/ul>\n<h2>For whom yes and for whom no<\/h2>\n<p><strong>Hello<\/strong> The advanced photographer looking for an astrograph to last for years.<\/p>\n<p><strong>Not<\/strong> As a first introduction to astrophotography, this is a lot of budget for the learning curve; If you want astrophotography without the mount learning curve and post-processing, then the <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/smart-telescopes\/\">smart telescopes<\/a> the shorter route; ours <a href=\"https:\/\/www.telescoop.nl\/en\/the-best-telescope-for-beginners\/\">Telescope Buying Guide for Beginners<\/a> explain the difference.<\/p>\n<h2>Featured accessories<\/h2>\n<p>These accessories add the most after purchase:<\/p>\n<ul>\n<li><strong>Camera adapter:<\/strong> The Sky-Watcher M48 adapters connect your Canon EOS or Nikon directly to the flattener or focuser.<\/li>\n<li><strong>Light Pollution Filter (2 inch)<\/strong> Under the Dutch or Belgian sky, a light pollution filter can significantly enhance the contrast in your photos.<\/li>\n<\/ul>\n<h2>Technical specifications<\/h2>\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Feature<\/th>\n<th>Description<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Type<\/td>\n<td>Refractor<\/td>\n<\/tr>\n<tr>\n<td>Design<\/td>\n<td>Apochromat<\/td>\n<\/tr>\n<tr>\n<td>Lens Design<\/td>\n<td>Triplet<\/td>\n<\/tr>\n<tr>\n<td>Aperture (mm)<\/td>\n<td>100<\/td>\n<\/tr>\n<tr>\n<td>Focal length (mm)<\/td>\n<td>550<\/td>\n<\/tr>\n<tr>\n<td>Focal Ratio (f\/)<\/td>\n<td>5,5<\/td>\n<\/tr>\n<tr>\n<td>Resolution<\/td>\n<td>1,15<\/td>\n<\/tr>\n<tr>\n<td>Limit value (mag)<\/td>\n<td>11,8<\/td>\n<\/tr>\n<tr>\n<td>Light output<\/td>\n<td>200<\/td>\n<\/tr>\n<tr>\n<td>Max. useful magnification<\/td>\n<td>200<\/td>\n<\/tr>\n<tr>\n<td>Tube material<\/td>\n<td>Aluminum<\/td>\n<\/tr>\n<tr>\n<td>Tube construction<\/td>\n<td>Full tube<\/td>\n<\/tr>\n<tr>\n<td>Tube weight (kg)<\/td>\n<td>6,3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"wp-block-columns is-layout-flex\">\n<div class=\"wp-block-column\" style=\"flex-basis:38%\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-100-550-ESPRIT-100ED-Apochromatische-Refractor-Professional-OTA-4.jpg\" alt=\"Sky-Watcher Esprit-100ED Apochromatic Triplet Refractor, Product Photo 2\" class=\"wp-image-90899\" title=\"\"><\/figure>\n<\/div>\n<div class=\"wp-block-column\" style=\"flex-basis:62%\">\n<h2>Included in the box<\/h2>\n<ul>\n<li>Sky-Watcher Esprit-100ED Optical Tube<\/li>\n<li>Finderscope: 9x50 right-angle<\/li>\n<li>Free: Stargazer's Handbook by Telescoop.nl (16 pages, Dutch language)<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h2>Free Stargazers' Handbook<\/h2>\n<p>Every Sky-Watcher telescope from Telescoop.nl comes with our own Stargazer\u2019s Handbook in the box. It\u2019s a 16-page booklet that helps you get started on your first few nights: how to align the finder scope, what magnification to start with, why the image sometimes wobbles, and when a telescope does or doesn\u2019t need to be collimated. It\u2019s not a thick book\u2014just the essentials you really need when you\u2019re starting out.<\/p>\n<h2>Honest advice from observers<\/h2>\n<p>We sell and use the Sky-Watcher line ourselves. In our <a href=\"https:\/\/www.telescoop.nl\/en\/skywatcher-telescopes\/\">Sky-Watcher brand guide<\/a> We'll explain which series are strong and which you'd rather skip. View the full range on our <a href=\"https:\/\/www.telescoop.nl\/en\/brands\/sky-watcher\/\">Sky-Watcher brand page<\/a>. Ordered before 11:59 PM gets it fast, in the Netherlands and Belgium. Unsure about mounting, flattener, or camera connection? Call or email us: we're happy to help with astrophotography setups.<\/p>","protected":false},"excerpt":{"rendered":"<p><strong>This is just the tube (OTA), without mounting and tripod.<\/strong> You can choose the appropriate mounting and the accessories that come with it below.<\/p>\n<p>The <strong>Sky-Watcher Esprit-100ED<\/strong> is globally one of the most acclaimed astrographs in its class: 100\/550 mm FPL-53 triplet with the color correction that keeps bright stars clean down to the pixel level. You will also receive our Stargazer's Handbook for free: 16 pages of practical explanations for your first nights with the telescope.<\/p>","protected":false},"featured_media":98177,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[542],"product_cat":[51,3175,567],"product_tag":[3352,3353],"class_list":["post-90896","product","type-product","status-publish","has-post-thumbnail","product_brand-sky-watcher","product_cat-telescopen","product_cat-refractor-ota","product_cat-refractor-telescopen","product_tag-sterrenkijker","product_tag-sterrenkijkers","first","outofstock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"outofstock","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":[27720,27759,32949,90722,90724,90682],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":107991,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-esprit-60edx\/","url_meta":{"origin":90896,"position":0},"title":"Sky-Watcher Esprit-60EDX","author":"Info telescoop","date":"12-05-2026","format":false,"excerpt":"The Sky-Watcher Esprit-60EDX brings professional triplet optics to a travel-sized package: Hoya FCD100 glass, Linear Power Focuser without image shift and a dedicated flattener stand included. You also get our Starry Sky Handbook for free: 16 pages of practical instructions for your first nights with the telescope.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Sky-Watcher Esprit-60EDX","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/ESPRIT-60EDX-Main-scaled.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/ESPRIT-60EDX-Main-scaled.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/ESPRIT-60EDX-Main-scaled.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/ESPRIT-60EDX-Main-scaled.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/ESPRIT-60EDX-Main-scaled.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/ESPRIT-60EDX-Main-scaled.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":90891,"url":"https:\/\/www.telescoop.nl\/en\/skywatcher-ap-80-400-esprit-80ed-apochromatische-refractor-professional-ota\/","url_meta":{"origin":90896,"position":1},"title":"Skywatcher AP 80\/400 ESPRIT-80ED Apochromatic Refractor Professional OTA","author":"","date":"03-12-2025","format":false,"excerpt":"This is just the tube (OTA), without mounting and tripod. You can choose the appropriate mounting and the accessories that come with it below. The Sky-Watcher Esprit-80ED is a compact professional triplet: 80\/400 mm FPL-53 at f\/5, so maximum signal per exposure minute with stars that stay in the corners. Includes...","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-80-400-ESPRIT-80ED-Apochromatische-Refractor-Professional-OTA-4.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":91128,"url":"https:\/\/www.telescoop.nl\/en\/skywatcher-m48-field-flattener-esprit-100ed\/","url_meta":{"origin":90896,"position":2},"title":"Sky-Watcher M48 Field Flattener for Esprit-100ED Triplet","author":"","date":"04-12-2025","format":false,"excerpt":"Skywatcher's 100 Flattener comes with M65 telescope mount, M48 camera adapter, M74 adapter ring and 55 mm backfocus - ideal for taking flat astrophotos to the image edge with the Skywatcher ESPRIT 100. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatchers-100-Flattener-Esprit-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":90879,"url":"https:\/\/www.telescoop.nl\/en\/skywatcher-ap-120-840-esprit-120ed-apochromatische-refractor-professional-ota\/","url_meta":{"origin":90896,"position":3},"title":"Skywatcher AP 120\/840 ESPRIT-120ED Apochromatic Refractor Professional OTA","author":"","date":"03-12-2025","format":false,"excerpt":"This is just the tube (OTA), without the mount and tripod. 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You get our Handbook for free with it\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-150-1050-ESPRIT-150ED-Apochromatische-Refractor-Professional-OTA-3.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":107988,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-0-75x-focal-reducer-flattener-esprit-60edx\/","url_meta":{"origin":90896,"position":5},"title":"Sky-Watcher 0.75x Focal Reducer\/Field Flattener for Esprit-60EDX","author":"Info telescoop","date":"12-05-2026","format":false,"excerpt":"Turn your Esprit-60EDX into an ultra-fast f\/4.5 system that drastically reduces exposure times and minimizes sensor tilt with heavier cameras. Where universal flaters often leave gaps, this 3-element design specifically corrects chromatic aberration and vignetting for a perfectly flat field of view. Thanks to the MHTC coatings, you maintain maximum contrast and prevent\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Sky-Watcher 0.75x Focal Reducer\/Field Flattener voor Esprit-60EDX","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/Optional-0.75x-Reducer-Flattener-for-Esprit-60EDX.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/Optional-0.75x-Reducer-Flattener-for-Esprit-60EDX.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/Optional-0.75x-Reducer-Flattener-for-Esprit-60EDX.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/Optional-0.75x-Reducer-Flattener-for-Esprit-60EDX.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/Optional-0.75x-Reducer-Flattener-for-Esprit-60EDX.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/05\/Optional-0.75x-Reducer-Flattener-for-Esprit-60EDX.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/90896","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=90896"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/98177"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=90896"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=90896"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=90896"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=90896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}