Clear Aperture 20" (508mm)

Optical Design

Advanced Coma Free (ACF)
Optical Coatings Ultra-High Transmission Coatings (UHTC)
Resolving Power (Dawes Limit) .228 arc seconds
Focal Length, Focal Ratio 4064mm, f/8
Mount type MAX Robotic Equatorial Mount
Gear pitch diameter 13.625"
Periodic error correction Five (5) arc seconds, both axes
Latitude 0-90°
Number of Gear teeth 652 (RA & DEC)
Control Panel 2 multi-function, multi-port panels
Focusing 4-speed front focusing mechanism
GPS 16-channel GPS receiver. With North sensor.
Pointing Precision High Precision Mode 5-arc min.
Autostar® II Hand Controller Included (147,541 object database)
Alignment Equatorial
North electronic sensor Included
Temperature Control Thermal stabilization fan
Slew Speeds

RA and Dec: 0.01x to1.0x sidereal, variable in0.01x increments;
2x, 8x, 16x, 64x, 128x sidereal; 1°/sec. to 2°/sec., variable in 0.1° increments

Tracking Rates Sidereal, lunar, or custom-selected from 2000 incremental rates
Primary, Secondary Mirror Difraction limited, low-expansion borosilicate
Correcting Plate/Lens High-spectral transmission Borofloat® from world-renowned Schott® AG Germany
Power 12VDC, 5amp power supply required
Counterweights

Requires 2 - 35lb. Counterweights (included)

Weights and Dimensions

RA Housing Assembly 66 pounds L = 20.75"; W = 18.85"; H = 20.34"
Dec Housing Assembly 75 pounds L = 18.25"; W = 15"; H = 20.45"
Counterweight Shaft Assembly 32 pounds without counterweights L = 38.1"; W = 1.25"
Portable Tripod 81 pounds Height: 26.5 inches; Footprint radius: 30 inches
Permanent Pier (optional) 39 pounds Minimum Height: 22"; Tube Diameter: 11.9"
Optical Tube Assembly (OTA) 190 pounds L = 40"; W = 25.7"; H = 25.7"
OTA + Mount + Counterweights 694 pounds L = 40"; W = 25.7"; H = 99.67"