{"id":90346,"date":"2025-11-29T10:37:13","date_gmt":"2025-11-29T09:37:13","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&#038;p=90346"},"modified":"2026-10-13T11:06:10","modified_gmt":"2026-10-13T09:06:10","slug":"sky-watcher-stargate-500p-synscan-goto-dobson","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/sky-watcher-stargate-500p-synscan-goto-dobson\/","title":{"rendered":"Sky-Watcher StarGate-500P SynScan - 500mm f\/4 Dobson"},"content":{"rendered":"<h2>Sky-Watcher StarGate-500P SynScan: the 20-inch giant<\/h2>\n<p>The Sky-Watcher StarGate-500P is a truss-Dobsonian with a 508 mm (20 inch, f\/4) parabolic mirror and SynScan GoTo. The collapsible metal construction can be assembled in about twenty minutes under a dark sky. This is the largest instrument in our <a href=\"https:\/\/www.telescoop.nl\/en\/telescopes\/dobsonian-telescopes\/\">Dobson assortment<\/a> And frankly, not a telescope but a portable observatory: whoever considers this usually already knows exactly why.<\/p>\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.telescoop.nl\/wp-content\/uploads\/2025\/11\/Skywatcher-N-508-2000-Stargate-500P-Dobson-Telescoop-Synscan-GoTo-DOB-2.jpg\" alt=\"Sky-Watcher StarGate-500P SynScan Dobsonian Telescope\" class=\"wp-image-90347\" title=\"\"><\/figure>\n<h2>What do you see through the StarGate 500P?<\/h2>\n<p>A half-meter mirror changes the night sky. Faint galaxies reveal structure invisible to smaller instruments, nebulae display colorful impressions, and with good seeing, you can resolve planetary details that approach photographic quality. The aluminized mirror with a multi-layer SiO2 coating maintains that performance for years.<\/p>\n<h2>Truss design with GoTo<\/h2>\n<p>The curved axes and smooth Dobson motion make manual tracking surprisingly quiet and stable. The SynScan control automatically slews and tracks, with Freedom Find so manual intervention never costs an realignment.<\/p>\n<h2>This is how to get the most out of this telescope<\/h2>\n<ul>\n<li><strong>Build-up Routine Plan:<\/strong> Reserve a half hour for the first few times; after that, twenty minutes is realistic.<\/li>\n<li><strong>Allow for at least an hour to cool down<\/strong> for the half-meter mirror.<\/li>\n<li><strong>Collimation at f\/4 is surgical work:<\/strong> a good collimator and the routine from our guide on <a href=\"https:\/\/www.telescoop.nl\/en\/telescope-collimation-this-is-how-to-adjust-your-reflector-in-focus\/\">collimation<\/a> are indispensable.<\/li>\n<li><strong>Dehumidification and dew point control<\/strong> A power tank for the GoTo motors and a light shroud around the truss to prevent stray light and dew are standard equipment.<\/li>\n<li><strong>Think of a small staircase:<\/strong> At high settings, the eyepiece is above eye level.<\/li>\n<\/ul>\n<h2>For whom yes and for whom no<\/h2>\n<p><strong>Hello<\/strong> The seasoned deep-sky observer or observatory group looking for the ultimate visual instrument and taking logistics seriously.<\/p>\n<p><strong>Not<\/strong> first or second large telescope. The leap from nothing to 20 inches skips steps that make observing fun; a <a href=\"https:\/\/www.telescoop.nl\/en\/sky-watcher-skyliner-200p-classic-dobson\/\">Skyliner-200P Classic<\/a> or a 300P teaches you the sky first. Astrophotography with long exposures belongs to other systems; this instrument is built for looking.<\/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>Description<\/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>508<\/td>\n<\/tr>\n<tr>\n<td>Focal length (mm)<\/td>\n<td>2000<\/td>\n<\/tr>\n<tr>\n<td>Focal Ratio (f\/)<\/td>\n<td>3,9<\/td>\n<\/tr>\n<tr>\n<td>Resolution<\/td>\n<td>0,23\u2033<\/td>\n<\/tr>\n<tr>\n<td>Limit value (mag)<\/td>\n<td>15,3<\/td>\n<\/tr>\n<tr>\n<td>Light output<\/td>\n<td>5270\u00d7<\/td>\n<\/tr>\n<tr>\n<td>Max. useful magnification<\/td>\n<td>1016\u00d7<\/td>\n<\/tr>\n<tr>\n<td>Tube construction<\/td>\n<td>Open tube<\/td>\n<\/tr>\n<tr>\n<td>Coating<\/td>\n<td>SiO\u2082<\/td>\n<\/tr>\n<tr>\n<td>Capture mirror diameter (mm)<\/td>\n<td>136<\/td>\n<\/tr>\n<tr>\n<td>Main mirror diameter (mm)<\/td>\n<td>508<\/td>\n<\/tr>\n<tr>\n<td>Main mirror ventilation<\/td>\n<td>No<\/td>\n<\/tr>\n<tr>\n<td>Main mirror design<\/td>\n<td>Parabolic<\/td>\n<\/tr>\n<tr>\n<td>Adjustable<\/td>\n<td>Yes<\/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-508-2000-Stargate-500P-Dobson-Telescoop-Synscan-GoTo-DOB-1.jpg\" alt=\"Sky-Watcher StarGate-500P SynScan Dobsonian Telescope, Product Photo 2\" class=\"wp-image-90349\" 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 StarGate-500P truss Dobsonian with SynScan GoTo mount<\/li>\n<li>Eyepieces: 10 mm (1.25\u2033), 28 mm (2\u2033)<\/li>\n<li>Searcher: 9x50<\/li>\n<li>SynScan GoTo Control<\/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> 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>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 depth: 136 mm<\/li>\n<li>Maximum useful magnification: 1016x<\/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>Focuser: 2-inch dual-speed Crayford with 1.25-inch adapter<\/li>\n<li>Viewfinder: 9\u00d750<\/li>\n<li>Digital single-lens reflex camera connection<\/li>\n<li>Light shroud included<\/li>\n<li>Drive: worm and toothed belt, 64 microsteps \/ 0.9 degree stepper motor<\/li>\n<li>Accuracy: up to 5 arcminutes (RMS)<\/li>\n<li>Transmission: azimut 400 \/ height 1523.796<\/li>\n<li>Power supply: DC 11V\/5A to 15V\/3A<\/li>\n<li>Total weight: 90 kg<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The <strong>Sky-Watcher StarGate-500P SynScan<\/strong> is a collapsible truss-Dobson with a 508 mm mirror (f\/4) and SynScan GoTo: a portable observatory that can be set up in about twenty minutes. You will also receive our Handboek voor Sterrenkijkers (Stargazer's Handbook) for free: 16 pages of practical explanations for your first nights with the telescope.<\/p>","protected":false},"featured_media":97919,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[542],"product_cat":[51,566,3161,2972],"product_tag":[3352,3353],"class_list":["post-90346","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-reflector-telescopen","product_tag-sterrenkijker","product_tag-sterrenkijkers","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":[24762,90428,31124,90682,90416],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":90303,"url":"https:\/\/www.telescoop.nl\/en\/sky-watcher-stargate-400p-flextube-goto-dobson\/","url_meta":{"origin":90346,"position":0},"title":"Sky-Watcher StarGate-400P FlexTube SynScan GoTo \u2013 400mm Dobsonian","author":"Info telescoop","date":"29-11-2025","format":false,"excerpt":"The Sky-Watcher StarGate-400P FlexTube SynScan GoTo combines a 406 mm mirror with automatic search and tracking of 42,900 objects. 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Includes a 2-inch Crayford-focusing eyepiece with T2 connection. 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