{"product_id":"telescopio-dobsoniano-sky-watcher-stargate-go-to-de-400-mm","title":"Sky-Watcher Stargate Go-To 400mm Dobsonian Telescope","description":"\u003ch2\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eStarGate range with a large 406 mm diameter, transportable by 1 person.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003ePerfect for deep sky observation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eFocal ratio at only f\/4 (wide field)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eLightweight primary and secondary mirror\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003e50.8 mm dual-speed 10:1 focuser\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eAutomatic (GOTO) pointing and motorized tracking\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eTruss-type structure, detachable into several elements and foldable.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"auto\"\u003eWiFi card included, allowing control of the telescope via a smartphone.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eAfter repeatedly revolutionizing the concept and accessibility of Dobsonian telescopes,\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eSky-Watcher now expands to very large diameters (over 400 mm)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e. The FlexTube series was the first collapsible Dobsonian telescope, offering greater ease of storage and transport. Subsequently, the introduction of motorized tracking on the FlexTube Go-To made Dobsonian telescopes extremely attractive. For several years, it has been possible to have\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003ea large diameter instrument (300, 350 or even 400 mm) with automatic pointing at an affordable price.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan dir=\"auto\"\u003eEverything you need to know about the Sky-Watcher Stargate 406 mm f\/4.06 GOTO Dobsonian telescope.\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe renowned Chinese manufacturer,\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003ea world leader in telescope manufacturing\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e, now offers\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003ethe StarGate range,\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003ewith 16\" (406 mm), 18\" (458 mm), and 20\" (508 mm) instruments for the most demanding amateurs, public observatories, and astronomy clubs. These larger diameters require\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003ea complete redesign so that they can be transported by a single person.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003eIn fact, the 350 and 406 mm FlexTube models are already too heavy to carry unaided (even just the base!). The base itself has been completely redesigned to resemble the ultra-compact Dobsonian telescopes of other manufacturers.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eWith such a mirror,\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003ea 406 mm telescope captures 77% more light than a 305 mm one\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e, making deep sky observation a delight. Messier objects are easily observed, and galaxies can be seen in detail (and not just located). Adding highly selective filters like O-III or H-beta does not result in a significant loss of brightness.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe most beautiful nebulae and clusters can be observed with an extraordinary level of detail\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e. With an f\/4 focal ratio and wide-field eyepieces, vast stellar expanses can be observed despite its large diameter: a 1650 mm focal length, equivalent to that of a 150 mm (6\") Schmidt-Cassegrain or shorter than a Mak150.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eOn planetary nights with low atmospheric turbulence and excellent collimation,\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003ethe results will be spectacular with such a large telescope\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e. Jupiter will reveal subtle color variations in its cloud bands with astonishing ease. Saturn will display its rings like never before. The Moon will be rediscovered, even by the most experienced observers. Mars, a fascinating but difficult object to observe, will reveal a wealth of details.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan dir=\"auto\"\u003eTruss-type construction\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe main idea of the StarGate range is to have an instrument that can be transported by a single person, without excessively heavy components.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe structure is of the Serrurier truss type\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e, with three detachable and foldable tubes and two V-shaped tubes connecting a central ring to the cage surrounding the primary mirror. The primary mirror cage rests on a base that allows the entire assembly to rotate 360°.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eIn terms of transport, the total weight is 50 kg, but the heaviest component weighs a maximum of 23 kg\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e. Assembly time is approximately 25-30 minutes after a few nights of observation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe secondary mirror cage is light (less than 4 kg) thanks to a single ring that holds both the secondary mirror holder and the focuser.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eA rigid shield, located on the opposite side, limits the entry of stray light near the focuser\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e. The tubes are easily coupled using small, comfortable thumbscrews. The tube folds for easy storage if you prefer not to disassemble it.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan dir=\"auto\"\u003eOptical Design\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe primary mirror is thus exposed to the outside with minimal protection. There is no primary mirror cage itself. The primary mirror holder, the mirror cell, is the main component to which the curved panels for tilt adjustment and the Serrurier truss tubes are attached.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe focuser height at the zenith is 1.8 m, which often eliminates the need for a stool\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eTo lighten the metallic structures, Sky-Watcher opted for special mirrors. Made of\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eBK7 borosilicate glass (with low thermal expansion),\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003ethe parabolic primary mirror features ribs that minimize its deformation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e, ensuring high performance regardless of the telescope's orientation angle. This design also makes it thinner, resulting in faster cooling and lower weight.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe secondary mirror, on the other hand, has a honeycomb structure (to achieve the same effect)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eLike the secondary mirror, the primary mirror is coated with\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003esilicon dioxide (SiO2) (a thin layer of quartz) for effective protection and 94% reflectivity.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003eThe image is bright, contrasted, and sharp: a delight for all your observations.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan dir=\"auto\"\u003eDual-Speed 10:1 Focusing Eyepiece Holder\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eFocusing is achieved using a\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003edual-speed Crayford focuser\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e. Much more precise than a basic rack-and-pinion system, it offers greater ease of use to achieve focus (which is even more delicate and sensitive due to the telescope's short focal ratio).\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eIt allows for fine focusing thanks to the 1:10 reduction ratio\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e, a highly appreciated advantage during observations with high magnification. It can support heavy loads. A locking screw located at the bottom of the focuser allows the focus to be maintained regardless of the optical tube's orientation. A 31.75 mm adapter is included as standard to use eyepieces of the same format with the 50.8 mm focuser.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eAlso included as standard is an achromatic finder with a mount. With a 50mm diameter and 9x magnification, it allows for observing objects invisible in smaller finders, greatly simplifying the search.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eTwo eyepieces, with 20mm and 12.5mm focal lengths (70° field of view), will provide you with a good range of magnifications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003ecompatible with any objective. Another important accessory is a protective skirt to limit the entry of stray light. Made of nylon, it is elastic, lightweight, and easily adaptable to the instrument.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan dir=\"auto\"\u003eGoTo Motorized System (Automatic Pointing)\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eFor greater\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003euser comfort\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e, Sky-Watcher offers the StarGate range with dual-axis motorization (equivalent to a motorized altazimuth mount) and a remote control for pointing and tracking objects. Therefore\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003e, it is not necessary to know the position of stars or distant deep-sky objects\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e; the Dobsonian AZ GOTO mount automatically moves the instrument to the target you want to observe.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eAfter calibration (polar alignment), orienting the optical tube north and leveling it, select the mount alignment on one or two stars.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe database stores over 42,900 objects, including those from major catalogs (Messier, NGC, IC, as well as planets, the Moon, and the Sun).\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003eFor convenience, the mount moves quickly using the SynScan handset. Easy to use, it allows you to quickly point the instrument at any galaxy, nebula, cluster, or solar system object. Discover in detail the famous Andromeda galaxy, the fabulous envelopes surrounding the heart of Orion, the Hercules cluster M13, and its core teeming with thousands of stars. Saturn, Jupiter, and the Moon are also wonders that can be observed without restrictions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\"\u003eThe handset screen, which displays the date, time, and observation location, along with\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003ethe \"Tour\" function, allows the AZ GOTO mount to be pointed at the most interesting objects throughout the night\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e. Enjoy a guided tour of the sky from your observation location by pressing the \"Enter\" button after selecting an object from the drop-down list. The ability to track any object eliminates the need for manual repositioning (a very practical function during public observing sessions).\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe object remains centered in the field of view\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003e, facilitating the observation of details, especially on planets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eThe Sky-Watcher StarGate GoTo range now includes an integrated WiFi card\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\"\u003e\u003cspan\u003e \u003c\/span\u003ethat allows remote control of the telescope with a smartphone or tablet, without the need for connection cables, using the free SynScan Pro app.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\"\u003eSpecifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetail\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical formula\u003c\/td\u003e\n\u003ctd\u003eNewtonian\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount\u003c\/td\u003e\n\u003ctd\u003eAltazimuth Dobsonian\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEffective diameter\u003c\/td\u003e\n\u003ctd\u003e406 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal length\u003c\/td\u003e\n\u003ctd\u003e1650 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.06\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary mirror\u003c\/td\u003e\n\u003ctd\u003e120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral obstruction\u003c\/td\u003e\n\u003ctd\u003e29.56% (linear) \/ 8.74% (area)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGo-To system\u003c\/td\u003e\n\u003ctd\u003eSynScan with automatic tracking and pointing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003eDual axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGo-To accuracy\u003c\/td\u003e\n\u003ctd\u003e±5 arc minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePointing speeds\u003c\/td\u003e\n\u003ctd\u003e1x to 800x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission\u003c\/td\u003e\n\u003ctd\u003eStepper motor with belt and pulley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDatabase\u003c\/td\u003e\n\u003ctd\u003e42,900 objects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking modes\u003c\/td\u003e\n\u003ctd\u003eSidereal, lunar, and solar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eIntegrated Wi-Fi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eDual-speed Crayford (1:10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece holders\u003c\/td\u003e\n\u003ctd\u003e2\" (50.8 mm) and 1.25\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube length\u003c\/td\u003e\n\u003ctd\u003e850 mm (folded) \/ 1500 mm (extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal weight\u003c\/td\u003e\n\u003ctd\u003e50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply (not included)\u003c\/td\u003e\n\u003ctd\u003e11–15 V DC, 5 A (2.1 mm connector, center positive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":53299991937367,"sku":"SW0502","price":3500.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/6198\/6860\/files\/telescope-dobson-sky-watcher-400mm-stargate-go-to.jpg?v=1776100230","url":"https:\/\/astrotelescopios.com\/en-efta\/products\/telescopio-dobsoniano-sky-watcher-stargate-go-to-de-400-mm","provider":"Astro Telescopios","version":"1.0","type":"link"}