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S11910 SKYWATCHER STARGATE 500P 20" TRUSS-TUBE DOBSONIAN

$9,449.95
SKU:
S11910
Weight:
70.0000 LBS
Shipping:
Calculated at checkout
Quantity:

Product Description

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.

 FEATURES

  • Fused conical primary mirror
  • Cellular secondary mirror
  • 2" 28mm LET eyepiece and 1.25" 10mm Plossl
  • 9x50 finderscope
  • clamps and shroud
  • Dual speed 2” Crayford focuser
  • Two section truss poles (compact transport)
  • Minimalist, all metal construction
  • Fast f/3.95 optics for short eyepiece heights
  • 20” provides 56% more light than a 16” telescope
  • 94% reflectivity coatings

SPECIFICATIONS

SKU S11910
UPC 050234119108
Optical Info 
Optical Design Newtonian
Mirror Coatings 94% Aluminum
Glass Type Borosilicate
Primary Aperture (mm) 508
F/Ratio 3.93
Focal Length (mm) 2000
Secondary Diameter 134mm
Secondary Obstruction (by diameter) 26%
Secondary Obstruction by Area 7%
Observational Info 
Dawes Limit 0.23
Rayleigh Limit 0.28
Limiting Mag. 16
Minimum Magnification 72
Maximum Magnification 1000
Light Gathering (compared to next size down) 23%
General Info 
Focuser 2" Dual Speed Crayford
Zenith Eyepiece Height 79"
Dob Base Weight 40 lbs
Upper Cage Weight 12 lbs
Truss Pole Weight 2.6 lbs each. 16 lbs total
Mirror Box Weight 70 lbs
Full Assembled Weight (with weights) 138 lbs
Accessories 
Included Finder 9x50 Finder
Included Diagonal No
Included Eyepieces 28 LET/10mm/Coll.
Magnification w/ Included Eyepieces 71x/200x
Included Case No
Corrector No
Other Included Accessories 2.3lbs counter weights (3), Shroud, Truss clamps

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