Superior Optics
Stargates 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 20 inch model captures 56% more light than the 16 inch.
Easy to transport and assemble
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.
Specifications
Optical Design: |
Dobsonian |
Primary Aperture : |
508mm (20”) |
Secondary Diameter |
134mm minor axis |
econdary Obstruction by Area |
7% |
Mirror Coatings: |
94% Aluminum |
Glass Type: |
Borosilicate |
Focal Length : |
2000mm |
Focal Ratio: |
3.95 |
Light Gathering : |
Captures 56% more light than a 16” telescope |
Zenith Eyepiece Height: |
79” |
Rayleigh Limit: |
0.28 |
Dawes Limitt: |
0.23 |
Limiting Magnitude: |
16 |
Minimum Magnification: |
72x |
Maximum Magnification : |
1000x |
GoTo: |
No |
Dual Encoders: |
Yes |
Focuser : |
Dual Speed Crayford |
Eyepieces: |
28mm LET eyepiece and 10mm eyepiece |
Finder Scope: |
9×50 |
Counter weights: |
2.3lbs, Shroud, Truss Clamps |
Shroud: |
Included |
Upper Cage Weight: |
12lbs |
Truss Pole Weight: |
2.6lbs each. 16lbs total |
Mirror Box Weight: |
70lbs |
Dobsonian Base Weight: |
66lbs |
Fully Assembled Weight (with weights): |
164lbs |