{"id":90896,"date":"2025-12-03T11:17:16","date_gmt":"2025-12-03T10:17:16","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=90896"},"modified":"2026-02-27T17:13:32","modified_gmt":"2026-02-27T16:13:32","slug":"skywatcher-ap-100-550-esprit-100ed-apochromatic-refractor-professional-ota","status":"publish","type":"product","link":"https:\/\/staging.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":"

Skywatcher AP 100\/550 - razor-sharp images for serious astrophotography<\/strong><\/h3>\n\n\n\n

The Skywatcher AP 100\/550 gives you a clear, calm and sharp image. You can immediately see why this refractor is popular with photographers who want no compromises. The triplet design with high-quality FPL-53 glass keeps colors perfectly in place, so your photos stay clean - even in very bright stars. This ensures high-contrast images with no purple edges and no distortion.<\/p>\n\n\n\n

\n
\"Skywatcher<\/figure>\n<\/figure>\n\n\n\n

Ready for the night, ready for your camera<\/h3>\n\n\n\n

The focal length of 550 mm gives you a wide field of view. That makes it easy to capture large nebulae, star fields and the Milky Way. Your sensor gets a lot of light, so you get shorter exposures and a sharp image faster. You notice immediately that you get more detail and depth in your photos.<\/p>\n\n\n\n

\n
\"Skywatcher<\/figure>\n<\/figure>\n\n\n\n

Focusing without stress<\/h3>\n\n\n\n

The Linear Crayford focuser feels sturdy and precise. You turn smoothly, with no backlash, placing focus exactly where you want it. The 1:11 fine adjustment lets you take that last little step, making your image really tight. The focuser effortlessly carries a heavy camera, so you work without worry.<\/p>\n\n\n\n

Strong, stable and built for travel<\/h3>\n\n\n\n

The tube is all aluminum and remains well balanced. The dew hood keeps the image clear even during long sessions. You get a sturdy transport case included to keep your telescope protected at all times. The 2\u2033 zenith mirror and 9\u00d750 angle viewfinder make aiming and framing easy.<\/p>\n\n\n\n

What we recommend<\/h3>\n\n\n\n

\u2713 Astrophotography: eminently suitable
\u2713 Planets: highly detailed, bright contrasts
\u2713 Deep-sky: fine for bright objects and nebulae
\u2717 Beginners: requires experience to take full advantage
\u2717 Observatory use: not suitable without an additional mount<\/p>\n\n\n\n

Specifications<\/strong><\/h1>\n\n\n\n

Optics<\/strong><\/h3>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Type<\/td>Refractor<\/td><\/tr>
Design<\/td>Apochromat<\/td><\/tr>
Lens Design<\/td>Triplet<\/td><\/tr>
Aperture (mm)<\/td>100<\/td><\/tr>
Focal length (mm)<\/td>550<\/td><\/tr>
Focal Ratio (f\/)<\/td>5,5<\/td><\/tr>
Resolution<\/td>1,15<\/td><\/tr>
Limit value (mag)<\/td>11,8<\/td><\/tr>
Light output<\/td>200<\/td><\/tr>
Max. useful magnification<\/td>200<\/td><\/tr>
Tube material<\/td>Aluminum<\/td><\/tr>
Tube construction<\/td>Full tube<\/td><\/tr>
Tube weight (kg)<\/td>6,3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Focuser<\/strong><\/h3>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Ocular connection<\/td>2\u2033<\/td><\/tr>
Connection (camera side)<\/td>M74<\/td><\/tr>
Design<\/td>Linear Crayford<\/td><\/tr>
Reduction<\/td>1:11 fine focusing<\/td><\/tr>
Free opening (mm)<\/td>76<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Mount<\/strong><\/h3>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Design<\/td>OTA<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Included accessories<\/strong><\/h3>\n\n\n\n
Section<\/th>Description<\/th><\/tr><\/thead>
Tube Rings<\/td>Yes<\/td><\/tr>
Seeker<\/td>9\u00d750 angle viewfinder<\/td><\/tr>
Zenith mirror<\/td>2\u2033, 90\u00b0 star diagonal<\/td><\/tr>
Dovetail<\/td>Losmandy-Style<\/td><\/tr>
Eyepiece adapter<\/td>2\u2033 \/ 1,25\u2033<\/td><\/tr>
Dew cap<\/td>Yes<\/td><\/tr>
Transport case<\/td>Yes<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

General<\/strong><\/h3>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Total weight (kg)<\/td>6,3<\/td><\/tr>
Series<\/td>ESPRIT<\/td><\/tr>
Astrophotography<\/td>Yes<\/td><\/tr>
Recommended for<\/td>Advanced<\/td><\/tr>
Beginners<\/td>No<\/td><\/tr>
Observatory<\/td>No<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"

Skywatcher AP 100\/550 comes with 2-inch 90\u00b0 zenith mirror, 9\u00d750 angle viewfinder, tube rings, Losmandy swallowtail, 2\u2033\/1.25\u2033 eyepiece adapter, extendable dew cap and sturdy padded transport case - ideal for advanced astrophotographers looking for a compact, bright triplet-apo.<\/p>\n

 <\/p>","protected":false},"featured_media":98177,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[542],"product_cat":[51,567],"product_tag":[],"class_list":["post-90896","product","type-product","status-publish","has-post-thumbnail","product_brand-sky-watcher","product_cat-telescopen","product_cat-refractors","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":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":90891,"url":"https:\/\/staging.telescoop.nl\/en\/skywatcher-ap-80-400-esprit-80ed-apochromatische-refractor-professional-ota\/","url_meta":{"origin":90896,"position":0},"title":"Skywatcher AP 80\/400 ESPRIT-80ED Apochromatic Refractor Professional OTA","author":"","date":"03-12-2025","format":false,"excerpt":"Skywatcher AP 80\/400 comes with 2-inch 90\u00b0 zenith mirror, 9x50 angle viewfinder, Vixen swallowtail, 2\"\/1.25\" eyepiece adapter, extendable dew cap and sturdy padded transport case - ideal for advanced astrophotographers looking for a compact, bright triplet-apo for widefield shooting. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-80-400-ESPRIT-80ED-Apochromatische-Refractor-Professional-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-80-400-ESPRIT-80ED-Apochromatische-Refractor-Professional-OTA-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-80-400-ESPRIT-80ED-Apochromatische-Refractor-Professional-OTA-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-80-400-ESPRIT-80ED-Apochromatische-Refractor-Professional-OTA-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":90879,"url":"https:\/\/staging.telescoop.nl\/en\/skywatcher-ap-120-840-esprit-120ed-apochromatische-refractor-professional-ota\/","url_meta":{"origin":90896,"position":1},"title":"Skywatcher AP 120\/840 ESPRIT-120ED Apochromatic Refractor Professional OTA","author":"","date":"03-12-2025","format":false,"excerpt":"Skywatcher AP 120\/840 comes with 3\" Linear-Power focuser with 2\" and 1.25\" adapters, 2\" LET 28mm eyepiece, 2\" 90\u00b0 star prism, 9x50 viewfinder, tube rings and Losmandy swallowtail - ideal for advanced observers and astrophotographers who want colorfast, high-contrast images. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-120-840-ESPRIT-120ED-Apochromatische-Refractor-Professional-OTA-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-120-840-ESPRIT-120ED-Apochromatische-Refractor-Professional-OTA-2.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-120-840-ESPRIT-120ED-Apochromatische-Refractor-Professional-OTA-2.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-120-840-ESPRIT-120ED-Apochromatische-Refractor-Professional-OTA-2.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":90885,"url":"https:\/\/staging.telescoop.nl\/en\/skywatcher-ap-150-1050-esprit-150ed-apochromatische-refractor-professional-ota\/","url_meta":{"origin":90896,"position":2},"title":"Skywatcher AP 150\/1050 ESPRIT-150ED Apochromatic Refractor Professional OTA","author":"","date":"03-12-2025","format":false,"excerpt":"Skywatcher AP 150\/1050 comes with 3-inch Linear-Power focuser with 2 and 1.25-inch adapters, 2-inch LET 28mm eyepiece, 2-inch 90\u00b0 star prism, 9x50 viewfinder, tube rings, Losmandy swallowtail, dew cap and sturdy transport cases - ideal for advanced astrophotographers and observatories demanding maximum sharpness and color accuracy. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-150-1050-ESPRIT-150ED-Apochromatische-Refractor-Professional-OTA-4.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-150-1050-ESPRIT-150ED-Apochromatische-Refractor-Professional-OTA-4.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-150-1050-ESPRIT-150ED-Apochromatische-Refractor-Professional-OTA-4.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/12\/Skywatcher-AP-150-1050-ESPRIT-150ED-Apochromatische-Refractor-Professional-OTA-4.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33784,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-91-540-refractor-apo-space-gray-ota\/","url_meta":{"origin":90896,"position":3},"title":"William Optics 91\/540 Refractor APO Space Gray OTA","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics AP 91\/540 comes with retractable dew cap, Bahtinov focus mask, Losmandy swallowtail, sturdy handle, 1:10 rack-and-pinion focuser and deluxe transport bag - ideal for sharp visual observation and astrophotography. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-91-540-Apochromatische-refractor-Space-Gray-OTA-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-91-540-Apochromatische-refractor-Space-Gray-OTA-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-91-540-Apochromatische-refractor-Space-Gray-OTA-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-91-540-Apochromatische-refractor-Space-Gray-OTA-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":33751,"url":"https:\/\/staging.telescoop.nl\/en\/william-optics-fluorostar-132-925-refractor-apo-red-ota\/","url_meta":{"origin":90896,"position":4},"title":"William Optics Fluorostar 132\/925 Refractor APO Red OTA","author":"","date":"14-11-2025","format":false,"excerpt":"William Optics AP 132\/925 comes with Bahtinov focus mask, 3.7\" rotary focuser with 1:10 fine adjustment, Losmandy swallowtail, handle and padded transport bag - a top-of-the-line FPL-53 triplet for razor-sharp astrophotos and visual deep-sky observations. \u00a0","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-132-925-Apochromatische-refractor-FluoroStar-Red-OTA-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-132-925-Apochromatische-refractor-FluoroStar-Red-OTA-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-132-925-Apochromatische-refractor-FluoroStar-Red-OTA-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2025\/11\/William-Optics-AP-132-925-Apochromatische-refractor-FluoroStar-Red-OTA-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":92032,"url":"https:\/\/staging.telescoop.nl\/en\/omegon-pro-96-575-apochromatische-refractor-triplet-ed-fcd-100\/","url_meta":{"origin":90896,"position":5},"title":"Omegon Pro 96\/575 Apochromatic Refractor Triplet ED FCD-100","author":"","date":"03-01-2026","format":false,"excerpt":"The Omegon Pro APO AP 96\/575 Refractor comes with a high-quality FCD100 triplet ED lens, CNC tube clamps, Vixen dovetail bar, 2-inch\/1.25-inch adapter, finderscope shoe, and extendable dew shield \u2013 ideal for astrophotographers who want to capture color-pure and high-contrast images.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Apochromatische-refractor-Pro-APO-AP-96-575-Triplet-ED-FCD-100-3.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Apochromatische-refractor-Pro-APO-AP-96-575-Triplet-ED-FCD-100-3.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Apochromatische-refractor-Pro-APO-AP-96-575-Triplet-ED-FCD-100-3.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/staging.telescoop.nl\/wp-content\/uploads\/2026\/01\/Omegon-Apochromatische-refractor-Pro-APO-AP-96-575-Triplet-ED-FCD-100-3.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/90896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=90896"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/98177"}],"wp:attachment":[{"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=90896"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=90896"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=90896"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/staging.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=90896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}