MI-250 Mount Specifications

Mountain Instruments Website

Polar Assembly

• 75 pound payload capacity (dependent on momentarm of OTA and type of pier)
• Easy 5 minute set up time
• 7.5" RA drive
• Matching precision ground worm
• Conical shape for maximum rigidity
• Major polar axis bearing-3.74" diameter
• Variable friction slip clutch
• Beautiful powder coated and black anodized finish
• Total RA (conical section) weight-36 pounds

Declination Assembly

• Conical shape
• 7.5" RA drive
• Matching precision ground worm
• 3.74" major bearing
• Easily secures onto polar base in less than 2 minutes
• 28 pounds total. (not including c.w.'s or shaft)
• Isolated and removable counter weight shaft
• 10 and 20 pound counter weights available
• Beautiful powder coated and black anodized finish

Control System

Gemini Astronomical Positioning System