Losmandy GM8 Equatorial Mount with Tripod and Gemini 2 Computer Drive

Losmandy GM8 Equatorial Mount with Tripod and Gemini 2 Computer Drive


Trust Losmandy for exceptional robustness and high build quality. Losmandy equatorial mounts are best-in-class. They are designed for the astronomer who demands unyielding performance from his equipment.

The Losmandy GM8 is great for small-to-medium sized instruments, for visual observation and astro-imaging.

Note on price: Due to the weight and sizes of the various shipping boxes, these mounts are expensive to ship from California. Please allow an additional $155.00 USD (plus applicable tax) on top of the price listed above. We will add this charge to your order when we process your payment.

Note on power supply: If you are powering from the AC mains, we recommend Losmandy's 15 volt power supply. This will ensure reliably sufficient current that a 12 volt supply may not quite provide.


  • 13.6kg (30lbs) instrument capacity
  • Gemini 2 computer drive system with full color touchscreen hand controller locates and tracks objects automatically
  • Heavy duty mount and precision gears are ideal for astrophotography
  • All machined aluminum and stainless steel, black anodized
  • All stainless steel hardware
  • DC Servos for imporved accuracy with higher torque than steppers
  • Fold-up tripod design for easy transporting
  • Wide 'D' style dovetail saddle-plate allows for the interchanging of any tube assembly
  • Fully locking, unique tangent arm design altitude adjustment with large knob for easy alignment

Gemini 2 Specifications

  • Full Color Graphic Touch Screen - clearly displays all functions
  • Classic four-button pattern for guiding, centering, moving and slewing on both the touch screen and a tactile membrane on the rear
  • Support for the original four-button controller
  • 8°/sec slew rate (GM8 model)
  • 0.5 arcsec positional accuracy
  • GPS: sold separately
  • Ports:
    • ST4 autoguide port
    • Ethernet 10/100 with full IP function permits operation from anywhere using a browser, ASCOM, or app over the web or serial port
    • Two USB ports; Virtual COM to PC, ASCOM or planetarium program
    • Port E - future high-res encoders
    • Port F - multi-function serial; A/D I/O
  • Non-Volatile Memory and Real-Time Clock
  • Languages: English, French & German
  • Over 40,000 objects
  • Firmware upgradable
  • PEC correction
  • Programmable Dec. Backlash Compensation (TVC)
  • Power: 12~18v DC input 3.0A
  • 12v accessory power jack


  • One 2.100" diameter needle thrust bearing
  • One 2.000” diameter needle thrust bearing
  • Two 1.500” diameter needle bearings
  • 2.812" diameter, 7075 aluminum worm gear, 180 tooth
  • Dual supported, ball bearing housed stainless steel worm-heat treated and ground
  • Variable slip clutch, both axes
  • 1.250” diameter stainless steel shafts
  • Latitude Adjustment Range: 0-64°
  • Laser engraved latitude scale in 2° increments
  • Single knob azimuth control, bi-directional +/- 8.5°
  • 3.5" diameter laser engraved setting circles, 6 minute R.A. vernier, 2° DEC. vernier
  • R.A. circle engraved for Northern and Southern Hemisphere
  • Porter slip ring design
  • 160 oz/in stepper motor, 0.5 arc sec. step
  • Removable stainless steel weight shaft w/safety knob
  • One 3.2kg (7lbs) counterweight included
  • 5kg (11lbs) and 9.5kg (21lbs) counterweights available (sold separately)
  • Polar Finder: Through-the-axis, sold separately
  • LT Tripod - all machined aluminum, black anodized, powder coated

Weights and Dimensions

  • Payload Capacity: 13.6kg (30lbs)
  • Weight of Equatorial Head: 9.5kg (21lbs)
  • Weight of Counterweight: 3.2kg (7lb)
  • Weight of Tripod: 6.8kg (15lbs)
  • Total Weight: 19.5kg (43lbs)
  • Height of Mount: 38cm (15") with latitude set to 34°
  • Height of Tripod: 68cm - 109cm (27" - 43")
  • Total Height: 106cm - 147cm (42" - 58") with latitude set to 34°