Specifications - Orion SpaceProbe 3 EQ Instruction Manual

Your SpaceProbe 3 EQ telescope requires very little mechan-
ical maintenance. The optical tube is steel and has a smooth
painted finish that is fairly scratch resistant. If a scratch does
appear, it will not harm the telescope. Refer to the appendix B
at the end of this manual for details of how to clean your tele-
scope's optics.

8. Specifications

Optical tube: Steel
Primary mirror diameter: 76mm
Primary mirror coating: Aluminum with silicon dioxide (SiO 2 )
overcoat
Secondary mirror minor axis: 19.9mm
Focal length: 700mm
Focal ratio: f/9.2
Focuser: Rack and pinion, accepts 1.25" eyepieces
Eyepieces: 25mm and 10mm Explorer II eyepieces, 1.25"
Magnification: 28x (with 25mm) and 70x (with 10mm)
Mount: German Equatorial, EQ-1
Tripod: Aluminum
Weight: 16.6 lbs.
Motor drive: Optional
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