Sky-Watcher 20" Stargate Truss-Tube Dobsonian

Sky-Watcher 20" Stargate Truss-Tube Dobsonian
Item # SW-S11910
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  • Aperture: 20"
  • Focal Length: 2000mm
  • Focal Ratio: F/3.95
  • Focuser: Dual Speed 2" Crayford
  • Best suited for: High end visual observation


Sky-Watcher has opened a portal to the stars with the new Stargate 20" Truss-Tube Dobsonian telescope. This telescope designed for immense light gathering power and ease of use, and is sure to deliver on both fronts for the most discerning of visual astronomers. With a maximum useful magnification of 1000x, you will find that the Sky-Watcher Stargate 20" Dobsonian makes it easy and enjoyable to scour planetary and deep sky visual targets for the most refined and subtle of details. The Stargate 20" is somewhat larger than its 18" sibling, but Sky-Watcher still estimates that it should take no longer than thirty minutes for an experienced astronomer to assemble and render it ready for observational use under normal circumstances.

And of course, it's not just raw power and convenience that Sky-Watcher prioritized when designing and making the Stargate 20". They also made sure to include a primary parabolic mirror design that eliminates the spherical aberrations that are otherwise inherent in faster focal length reflectors. These mirrors are designed to bring all of the light your telescope has gathered to a single focal point and ensure sharp, high contrast, high detail images. Every optical mirror in the Stargate, including the parabolic primary mirror, is fully multi-coated with high quality Silicon Dioxide coatings that ensure optimal durability and performance.
Additional Information

Additional Information

SKU SW-S11910
UPC Code 050234119108
Manufacturer Sky-Watcher
Telescope Series Sky-Watcher Stargate
Optical Design Dobsonian
Mount Type Dobsonian Cradle
Telescope Aperture 508mm (20")
Telescope Focal Length 2000mm
Telescope Focal Ratio F/3.95
Highest Useful Magnification 1000x
Limiting Stellar Magnitude 16
Focuser Size 2"
Focuser Style Crayford
Manual or Electronic Focusing? Manual
Focusing Speeds Two-Speed
Finder Included 9 x 50 Optical Finder
Included Items

Included Items

  • Sky-Watcher 20" Stargate Dobsonian
  • 2" Dual Speed Crayford Focuser W/ 1.25" & 2" Extension Tubes
  • 2" 28mm LET Eyepiece
  • 9X50 Straight-Through Finderscope
  • Cast Metal Rocker and Base with Teflon Bearings
  • Clamps & Shroud
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