Dobson Sky-Watcher Stargate 400mm Dobson Sky-Watcher Telescope with Go-To system

Dobson Sky-Watcher StarGate Sky-Watcher 406 mm f/4 GoTo Telescope

Power, portability and technology for deep sky enthusiasts

After revolutionizing the Dobson telescope concept on several occasions, Sky-Watcher goes one step further with the StarGate, dedicated to the large diameters over 400 mm. With this innovative design, the world's leading manufacturer of telescopes offers instruments designed both for advanced amateur astronomers, as for public observatories and astronomical associations.

The FlexTube models already marked a before and after with their folding design. Later, the incorporation of the Motorized GoTo made them large-aperture Dobson telescopes accessible to more amateurs. Now, with the StarGate, sky-Watcher presents telescopes from 16" (406 mm), , 18" (458 mm) y 20" (508 mm), redesigned so that they can carried and assembled by a single person, without sacrificing stability and optical quality.

A 406 mm Dobson: the gateway to the deep universe

With a primary mirror of 406 mm opening and a focal ratio of f/4, this telescope offers a 77% more light capture than 305 mm. This translates into observations of galaxies, nebulae and clusters with an impressive level of detail, even when using selective filters such as OIII or H-beta.

The messier objects are clearly displayed, and the most spectacular nebulae reveal previously invisible structures. Thanks to their large field of vision, in addition, it is possible to observe large stellar regions, which is unusual for a telescope of this diameter.

In planetary observation, under conditions of good atmospheric stability and with correct collimation, the results are outstanding:

• Jupiter shows shades of color in its cloud bands with great ease.

• Saturn reveals its rings in stunning detail.

• The Moon becomes a rediscovered spectacle even for experienced observers.

• Mars, always challenging, reveals subtle details on its surface.

Serrurier design: power and portability

The Sky-Watcher StarGate 406 mm f/4 GoTo is designed under the architecture Serrurier, which guarantees structural rigidity and lightness.

• Removable and foldable structure in several elements, easily manipulated.

• Total weight 43 kg, with the heaviest component - the primary mirror - limited to just 15 kg, this facilitates transportation.

• Assembly in 25-30 minutes, once they have acquired practice in its manipulation.

The secondary mirror housing is particularly light (less than 4 kg) thanks to a minimalist design with a single ring. The 50.8 mm Dual Speed 10:1 eyepiece holder ensures smooth and precise focusing, while a integrated rigid display protects against stray light.

GoTo technology and smartphone control

This model incorporates goTo automatic targeting and motorized tracking, this makes it possible to locate and track thousands of objects in the astronomical catalog at the touch of a button. In addition, thanks to the wiFi card included, the telescope can be comfortably controlled from a smartphone or tablet with compatible applications.

Main features

• Opening: 406 mm

• Focal ratio: f/4 (1650 mm focal length)

• Detachable and foldable Serrurier structure

• Lightened primary and secondary mirror

• 50.8 mm Dual Speed (10:1) eyepiece holder

• System GoTo with motorized tracking

• Control via WiFi from smartphone or tablet

• Total weight: 43 kg (maximum single piece: 15 kg)

Optical design: power and lightness in a large diameter

The Sky-Watcher Dobson StarGate 406 mm f/4 GoTo has been designed with high-performance optics and an innovative structure to provide maximum deep sky and planetary detail. The primary mirror is "open" to the outside, this reduces weight and facilitates cooling. There is no traditional "primary housing": the mirror barillet acts as a centerpiece, supporting the curved tilt panels and Serrurier tubes. Thanks to this design, the height at the zenith for the eyepiece holder is only 1,80 m, avoiding the need to use steps or platforms.

In order to lighten the structure, Sky-Watcher uses bK7 borosilicate mirrors, a glass with low thermal expansion that guarantees high stability and minimum deformation.

• The parabolic primary mirror is ribbed, which improves rigidity, accelerates cooling and reduces weight.

• The secondary mirror incorporates a honeycomb structure, with the same benefits of stability and lightness.

• Both mirrors are coated with silicon dioxide (SiO₂), a protective layer of quartz that ensures a 94% reflectivityBright, contrasted and sharp images.

The result is an extraordinary visual experience, both in nebulae and galaxies as in Moon and planets.

Accurate focusing with Dual Speed 10:1 eyepiece holder

The fine-tuning is carried out by means of a crayford dual-speed eyepiece holder, the system is much more precise than conventional rack and pinion systems.

• Your demultiplication 1:10 allows fine focusing, essential in fast telescopes like this one (f/4).

• Supports heavy loads, ideal for large eyepieces or advanced accessories.

• Includes standard adapter for 50.8 mm to 31.75 mm to use a wide variety of eyepieces.

• A locking vis ensures the stability of the focusing position, regardless of the orientation of the tube.

In addition, it comes equipped with a 9x50 mm achromatic optical finder, the scope includes two wide-angle eyepieces (20 mm and 12.5 mm, 70° apparent field) to start enjoying different magnification combinations. Also included is a nylon protective skirt to reduce the entry of stray light.

GoTo SynScan system: automatic targeting and intelligent control

The Sky-Watcher StarGate 406 mm GoTo has a system of dual-axis motorization that turns the telescope into a motorized altazimuth Dobson mount high performance. With the synScan racquet, the user can perform pointing and tracking in a simple and precise way, without the need to know the position of the stars beforehand.

• Database with more than 42,900 objects, including Messier, NGC, IC, planets, Moon and Sun catalogs.

• Mode of alignment in 1 or 2 stars for quick calibration.

• Tour" functionThe "Viewing" function: allows you to perform an automatic tour of the most outstanding objects visible from your observation site.

• The object always remains in the center of the visual field, avoiding manual corrections, which is ideal for public or outreach sessions.

With this system, it is possible to discover in detail the andromeda galaxy, the orion nebulae, the hercules cluster M13, or enjoy for hours the rings of Saturn, the cloud bands of Jupiter or the craters of the Moon.

WiFi connection and control from smartphone or tablet

The range Sky-Watcher StarGate GoTo integrates as standard a wiFi card, which allows the telescope to be controlled wirelessly through the free application SynScan Pro. In this way, you can steer your telescope directly from a smartphone or tablet, making the viewing experience more intuitive, fluid and modern.

TECHNICAL SPECIFICATIONS:

Technical Characteristics - Dobson Sky-Watcher StarGate 406 mm f/4 GoTo Dobson Sky-Watcher Telescope

• Telescope type: Dobson Sky-Watcher StarGate 406 mm f/4 GoTo

• Optical design: Newton

• Saddle: Dobson Azimuth with GoTo system

• Useful diameter: 406 mm

• Focal length: 1650 mm

• Focal ratio (F/D): f/4.06

• Secondary mirror: 120 mm

• Central obstruction: 29.56% linear - 8.74% in surface area

• Control and guidance: Dual-axis motorized with GoTo SynScan system (automatic targeting and tracking of celestial objects)

• Motor and precision: Dual-axis motors with 5' arc pointing accuracy - Speeds from 1x to 800x

• Transmission: Stepper motor with belt and pulley

• GoTo system: SynScan Racket with database of more than 42,900 objects (Messier, NGC, IC, planets, Moon and Sun) - Tracking modes: sidereal, lunar and solar

• Wireless connection: Integrated WiFi card for control from smartphone or tablet

• Focus: Crayford eyepiece holder with 1:10 gear ratio (Dual Speed)

• Eye holder: Double size: 2" (50.8 mm) and 1.25" (31.75 mm)

• Optical tube length: 850 mm (folded) / 1500 mm (unfolded)

• Total weight of the set: 43 kg (heaviest part: primary mirror 15 kg)

• Power supply (not included): 11-15V DC, 5A, 2.1 mm connector (positive pole to center)

Conclusion

The Sky-Watcher Dobson StarGate 406 mm GoTo is the ideal telescope for those who are looking for a exceptional openness in a transportable design, with the convenience of automatic targeting and the sky-Watcher optical quality. Perfect for deep sky, advanced planetary observation and use in astronomical associations or clubs.

Discover the universe as you have never imagined it before.

Package Contents - Dobson Sky-Watcher StarGate 406 mm f/4 GoTo Dobson Sky-Watcher Telescope

• 1x Dobson Sky-Watcher StarGate StarGate 406 mm f/4 GoTo optical tube

• 1x Azimuth base

• 1x SynScan control racket with connecting cable

• 1x Super 20 mm WA 70° (1.25") Eyepiece - Magnification: 82.5x

• 1x Eyepiece Super 12.5 mm WA 70° (1.25") - Magnification: 132x

• 1x 9x50 straight optical finder

• 1x Flexible protective skirt (to reduce stray light)

• 1x Smartphone adapter

• 1x 5.5/2.1 mm power cable with car cigarette lighter connector

Dobson Sky-Watcher Stargate 400mm Dobson Sky-Watcher Telescope with Go-To system