Losmandy GM8 Equatorial Mount with Tripod and Gemini 2 Computer Drive

Losmandy GM8 Equatorial Mount with Tripod and Gemini 2 Computer Drive

Due to high demand and global product shortages due to the pandemic, please call for availability.

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°