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Stargate 20″ Truss Dobsonian

$6,999.00

  • Fused conical primary mirror
  • Cellular secondary mirror
  • 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
SKU: S11910 Category:

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Additional Information

Optical Design

Dobsonian

Primary Aperture (mm)

508mm (20”)

Secondary Diameter (mm)

134mm minor axis

Secondary Obstruction by Area

7%

Mirror Coatings

94% Aluminum

Glass Type

Borosilicate

Focal Length (mm)

2000mm

Focal Ratio

3.95

Light Gathering (compared to next size down)

Captures 56% more light than a 16” telescope

Zenith Eyepiece Height

79”

Rayleigh Limit

0.28

Dawes Limit

0.23

Limiting Magnitude

16

Minimum Magnification

72x

Maximum Magnification

1000x

GoTo

No

Focuser

2″ Dual Speed Crayford

Included Eyepieces

28mm LET eyepiece and 10mm eyepiece

Included Finder

9×50

Other Included Items

2.3lbs counter weights (3), Shroud, Truss clamps

Upper Cage Weight

12lbs.

Truss Pole Weight

2.6lbs each. 16lbs total

Mirror Box Weight

70lbs.

Dobsonian Base Weight

40lbs.

Fully Assembled Weight (with weights)

138lbs.