{"id":90303,"date":"2025-11-29T09:01:33","date_gmt":"2025-11-29T08:01:33","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=90303"},"modified":"2026-07-23T11:56:01","modified_gmt":"2026-07-23T09:56:01","slug":"sky-watcher-stargate-400p-flextube-goto-dobsonian","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/sky-watcher-stargate-400p-flextube-goto-dobson\/","title":{"rendered":"Sky-Watcher StarGate-400P FlexTube SynScan GoTo \u2013 400mm Dobsonian"},"content":{"rendered":"<h2>Sky-Watcher Skyliner-400P FlexTube SynScan GoTo: The 16-inch Observatory with Autopilot<\/h2>\n<p>This configuration pairs the 406 mm mirror (f\/4.4) with SynScan GoTo: automatically locate and track 42,900 objects, with dual encoders for manual movement at any time. With a mirror that captures over two and a half times more light than a 10-inch, this isn't a gadget: the computer unlocks the faint objects for which this aperture is made.<\/p>\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-N-406-1800-Dobson-Telescoop-Skyliner-FlexTube-BD-DOB-GoTo-2.jpg\" alt=\"Sky-Watcher Skyliner-400P FlexTube SynScan GoTo Dobsonian Telescope\" class=\"wp-image-90304\" title=\"\"><\/figure>\n<h2>What can you see through the 400P GoTo?<\/h2>\n<p>Dark matter tracks in Andromeda, filaments in Orion, subtle structure in globular clusters, and planetary detail that, on clear nights, borders on the visually impossible. With automatic tracking, any target remains steady at high magnification, ideal for long sessions and for guiding guests.<\/p>\n<h2>Ready for short recordings<\/h2>\n<p>The 2-inch focuser with T2 mount allows you to directly connect a camera for short lunar and planetary shots. For visual work, the included adapters accept any standard eyepiece.<\/p>\n<h2>This is how to get the most out of this telescope<\/h2>\n<ul>\n<li><strong>To them, in part:<\/strong> Disassemble the equatorial mount and motorized rocker box separately, preferably with two people. Plan the route to your observing location on it.<\/li>\n<li><strong>Close the open section:<\/strong> A light shroud around the extended truss keeps stray light and dew out. The standard upgrade for FlexTube models.<\/li>\n<li><strong>Allow for at least an hour to cool down<\/strong> For the large mirror, especially in winter.<\/li>\n<li><strong>Collimation at f\/4.4 is a fixed ritual<\/strong> on transport; our guide to <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-collimation-this-is-how-to-adjust-your-reflector-in-focus\/\">collimation<\/a> It takes two minutes.<\/li>\n<li><strong>Use a power tank:<\/strong> The GoTo motors run on 12V and cold nights drain battery capacity. An external battery will keep it going all night.<\/li>\n<\/ul>\n<h2>For whom yes and for whom no<\/h2>\n<p><strong>Hello<\/strong> The observer who wants the ultimate visual instrument and has the logistics in order: fixed location, help with lifting, power supply arranged.<\/p>\n<p><strong>Not<\/strong> When in doubt about size, any smaller Skyliner is the wiser choice. Long exposures belong with the <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/smart-telescopes\/\">smart telescopes<\/a>; Short camera recordings via T2 are a strong side effect here.<\/p>\n<h2>Featured accessories<\/h2>\n<p>These accessories add the most after purchase:<\/p>\n<ul>\n<li><strong>Moon Filter 13%:<\/strong> With this mirror size, the moon is blindingly bright. The <a href=\"https:\/\/www.telescoop.nl\/en\/omegon-moon-filter-for-telescopes-13-125\/\">Omegon Moon Filter 13% (1.25 inches)<\/a> dims the light and increases the contrast. More explanation is in our <a href=\"https:\/\/www.telescoop.nl\/en\/best-moon-filter-telescope\/\">Moon filter guide<\/a>.<\/li>\n<li><strong>Cheshire eyepiece<\/strong> the <a href=\"https:\/\/www.telescoop.nl\/en\/sky-watcher-cheshire-collimation-eyepiece-1-25\/\">Sky-Watcher Cheshire Eyepiece<\/a> Aligning the mirrors is more accurate than the included tools. With these fast opening ratios, it's not a luxury but a essential piece.<\/li>\n<\/ul>\n<h2>Technical specifications<\/h2>\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>Feature<\/th>\n<th>Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Type<\/td>\n<td>Reflector<\/td>\n<\/tr>\n<tr>\n<td>Design<\/td>\n<td>Newton<\/td>\n<\/tr>\n<tr>\n<td>Aperture (mm)<\/td>\n<td>406<\/td>\n<\/tr>\n<tr>\n<td>Focal length (mm)<\/td>\n<td>1800<\/td>\n<\/tr>\n<tr>\n<td>Aperture ratio (f\/)<\/td>\n<td>4,4<\/td>\n<\/tr>\n<tr>\n<td>Resolution<\/td>\n<td>0,28\u2033<\/td>\n<\/tr>\n<tr>\n<td>Limit value (mag)<\/td>\n<td>14,8<\/td>\n<\/tr>\n<tr>\n<td>Light output<\/td>\n<td>3360\u00d7<\/td>\n<\/tr>\n<tr>\n<td>Max. useful magnification<\/td>\n<td>812\u00d7<\/td>\n<\/tr>\n<tr>\n<td>Tube weight (kg)<\/td>\n<td>38<\/td>\n<\/tr>\n<tr>\n<td>Construction<\/td>\n<td>Open tube<\/td>\n<\/tr>\n<tr>\n<td>Mirror<\/td>\n<td>Parabolic<\/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\/11\/Skywatcher-N-406-1800-Dobson-Telescoop-Skyliner-FlexTube-BD-DOB-GoTo-5.jpg\" alt=\"Sky-Watcher Skyliner-400P FlexTube SynScan GoTo Dobsonian Telescope, Product Photo 2\" class=\"wp-image-90307\" 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 Skyliner-400P FlexTube Optical Tube with Motorized GoTo Rocker Box<\/li>\n<li>Eyepieces: 25 mm &amp; 10 mm<\/li>\n<li>Searcher: 9x50<\/li>\n<li>Adapters: 2\" \/ 1.25\"<\/li>\n<li>SynScan GoTo Control<\/li>\n<\/ul>\n<\/div>\n<\/div>\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 merk 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 merk Page<\/a> or compare all models in our <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/dobsonian-telescopes\/\">Dobson assortment<\/a>. If ordered before 11:59 PM, it will be delivered quickly, in the Netherlands and Belgium. Not sure about the size or version? Call or email us: these are purchases we're happy to help you think through.<\/p>\n<h3>Manufacturer's additional specifications<\/h3>\n<ul>\n<li>Manufacturer Model Name: StarGate-400P SynScan FlexTube<\/li>\n<li>Focal length: 1650 mm (f\/4.1)<\/li>\n<li>Mirror material: Low-Expansion Borosilicate Glass (primary and secondary)<\/li>\n<li>Mirror coating: RAQ (Radiant Aluminum Quartz), 94% reflectance<\/li>\n<li>Primary mirror with patented weight-saving design<\/li>\n<li>Mirror length: 120 mm<\/li>\n<li>Included eyepieces: 12.5 mm and 20 mm, 70-degree wide-angle (1.25 inch)<\/li>\n<li>Collimation eyepiece (1.25 inch) included<\/li>\n<li>2 inch dual-speed Crayford focuser with 1.25 inch and 2 inch adapters<\/li>\n<li>Universal smartphone adapter (for devices 54 to 90 mm wide)<\/li>\n<li>Light shroud included<\/li>\n<li>Tube length extended: 1500 mm, retracted: 850 mm<\/li>\n<li>Drive: worm and timing belt, 256 microsteps\/1.8 degree stepper motor<\/li>\n<li>Accuracy: 5 arcminutes (RMS)<\/li>\n<li>Transmission: azimuth 854.182 \/ altitude 1655.636<\/li>\n<li>Connections: USB-B, remote control, power supply<\/li>\n<li>Power supply: DC 11V\/5A to 15V\/3A<\/li>\n<li>Total weight: 50 kg<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The <strong>Sky-Watcher StarGate-400P FlexTube SynScan GoTo<\/strong> combines a 406 mm mirror with automatic object finding and tracking of 42,900 objects. More than two and a half times more light than a 10-inch, with Freedom Find encoders and a T2 camera mount.<\/p>","protected":false},"featured_media":97884,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[542],"product_cat":[51,566,3161,3165,3160,2972],"product_tag":[],"class_list":["post-90303","product","type-product","status-publish","has-post-thumbnail","product_brand-sky-watcher","product_cat-telescopen","product_cat-dobson-telescopen","product_cat-goto-dobson","product_cat-goto-reflectors","product_cat-inklapbare-dobson","product_cat-reflector-telescopen","product_shipping_class-telescoop","first","onbackorder","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"onbackorder","bundle_stock_quantity":0,"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":[24762,90428,31124,90414,90682],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":90298,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-skyliner-400p-flextube-dobson\/","url_meta":{"origin":90303,"position":0},"title":"Sky-Watcher Skyliner-400P FlexTube - 400mm Parabolic Dobson","author":"Info telescoop","date":"29-11-2025","format":false,"excerpt":"De Sky-Watcher Skyliner-400P FlexTube is de top van visueel waarnemen: 406 mm spiegel (f\/4,4), dual-speed 10:1 Crayford-focuser en een buis die inschuift tot 107 cm. Geleverd met twee 70 graden oculairs, 9x50 zoeker en smartphone-adapter.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Sky-Watcher Skyliner-400P FlexTube \u2013 400mm Parabolische Dobson","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/SKYLINER-400P-FLEXTUBE-10230.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/SKYLINER-400P-FLEXTUBE-10230.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/SKYLINER-400P-FLEXTUBE-10230.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/SKYLINER-400P-FLEXTUBE-10230.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/SKYLINER-400P-FLEXTUBE-10230.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":90272,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-skyliner-300p-flextube-synscan-goto\/","url_meta":{"origin":90303,"position":1},"title":"Sky-Watcher Skyliner-300P FlexTube SynScan GoTo - 300mm Dobson","author":"","date":"28-11-2025","format":false,"excerpt":"De Sky-Watcher Skyliner-300P FlexTube SynScan GoTo koppelt 12 inch lichtopbrengst aan automatisch zoeken en volgen (42.900 objecten), met Freedom Find-encoders zodat handmatig bewegen altijd kan. Inclusief 2 inch Crayford-focuser met T2-aansluiting.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Sky-Watcher Skyliner 305\/1500 FlexTube GoTo Dobson telescoop","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-N-305-1500-Telescoop-Dobson-Skyliner-FlexTube-BD-DOB-GoTo-2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":90279,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-skyliner-350p-flextube-synscan-goto\/","url_meta":{"origin":90303,"position":2},"title":"Sky-Watcher Skyliner-350P FlexTube SynScan GoTo - 350mm Dobson","author":"","date":"28-11-2025","format":false,"excerpt":"De Sky-Watcher Skyliner-350P FlexTube SynScan GoTo combineert 14 inch lichtopbrengst met automatisch zoeken en volgen (42.900 objecten) en Freedom Find-encoders. 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Geleverd met 25 mm en 10 mm oculair en red dot finder.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Skywatcher heritage 150p","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/05\/Skywatcher-Dobson-telescope-N-150-750-Heritage-FlexTube-Virtuoso-GTi.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/05\/Skywatcher-Dobson-telescope-N-150-750-Heritage-FlexTube-Virtuoso-GTi.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/05\/Skywatcher-Dobson-telescope-N-150-750-Heritage-FlexTube-Virtuoso-GTi.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/05\/Skywatcher-Dobson-telescope-N-150-750-Heritage-FlexTube-Virtuoso-GTi.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/05\/Skywatcher-Dobson-telescope-N-150-750-Heritage-FlexTube-Virtuoso-GTi.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2025\/05\/Skywatcher-Dobson-telescope-N-150-750-Heritage-FlexTube-Virtuoso-GTi.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/90303","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=90303"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/97884"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=90303"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=90303"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=90303"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=90303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}