Fused conical primary mirror
Cellular secondary mirror
Dual speed 2” Crayford focuser
Two section truss poles (compact transport)
Minimalist, all metal construction
Fast f/4.1 optics for short eyepiece heights
18” provides 27% more light than a 16” telescope
94% reflectivity coatings
Freedom Find, dual encoders
SynScan with 42,000+ object database


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Our superior optics just got better

Stargate’s feature Sky-Watcher’s exclusive fused conical parabolic mirrors. The fused design allows for thinner mirror construction that provides faster cooling and lighter weight.

Combined with the cast cellular secondary mirror and Sky-Watcher’s exclusive 94% reflectivity coatings, Stargate delivers bright, detailed views of your favorite deep sky objects. The 18 inch model captures 27% more light than our 16 inch, while the 20 inch (a full half meter of aperture) boasts a monster 56% more light gathering power.

Solid foundations, easy assembly

The minimalist all-metal structure of the Stargate produces a sturdy and stable platform while maintaining a convenient and compact footprint. The truss-tubes break down to a very manageable 36 inch length for easy transport. Azimuth and altitude bearings are steel and Teflon for smooth, steady movement.

Setting up a Stargate is a simple procedure, taking only about 20 minutes. Spring loaded truss anchor points are clearly labeled to eliminate any frustration or confusion. Adjustable feet make leveling a snap.

Synscan puts the universe in your hands

Our GoTo line of Stargates provide motorized operation in both alt and azimuth axes. Featuring Sky-Watcher’s proprietary SynScan hand controller, your scope now automatically slews to and tracks over 42,900 celestial objects from the on-board database.

Sky-Watcher’s Freedom Find™ dual-encoder technology ensures accurate tracking while allowing you to move the telescope manually in either axis without compromising alignment. This provides a level of convenience and flexibility not available in telescopes without dual encoders.

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Optical Info
Optical Design: Newtonian
Mirror Coatings: 94% Aluminum
Glass Type: Borosilicate
Primary Aperture (mm): 458
F/Ratio: 4.14
Focal Length (mm): 1900
Secondary Diameter: 120mm
Secondary Obstruction (by diameter): 26%
Secondary Obstruction by Area: 7%
Observational Info:
Dawes Limit: 0.25
Rayleigh Limit: 0.31
Limiting Mag.: 15.9
Minimum Magnification: 65
Maximum Magnification: 902
Light Gathering (compared to next size down): 27%

General Info
Focuser: 2" Dual Speed Crayford
Zenith Eyepiece Height: 74.5"
OTA Length (Retract/Ext.): 78.75"
OTA Outer Diameter: 20.5"
Dob Base Weight: 40 lbs
Upper Cage Weight: 11 lbs
Truss Pole Weight: 2.6 lbs each. 16 lbs total
Mirror Box Weight: 62 lbs
Full Assembled Weight (with weights): 129 lbs

Included Finder: 9x50 Finder
Included Diagonal: No
Included Eyepieces: 28 LET/10mm/Coll.
Magnification w/ Included Eyepieces: 68x/190x
Included Case: No
Corrector: No
Other Included Accessories: 2.3lbs counter weights (3), Shroud, Truss clamps

Stargate 450 SynScan 18"
9x50 Finder
1x 28 LET eyepiece
1x10mm eyepiece
1x Collimation eyepiece
SynScan hand controller
3x 2.3 lb Counterweight
Truss clamps
DC Power Cable

Stargate Synscan Manual