Skip to content

Losmandy G11GT-LT Equatorial Mount with Gemini GoTo System - No Tripod - G11GT-LT

SKU: LOS-G11GT-LT

Losmandy GM11GT Gemini 2 Equatorial Mount - No Tripod


The modular Losmandy GM11GT Equatorial Mount comes with the Titan RA Axis and the G11 Dec Axis for amazing performance and a big 75-pound weight capacity. Losmandy mounts are machined from stainless steel and aluminum in California and have a much-deserved reputation for being one of the finest precision mounts in the world. The gear diameter of the GM11GT is 172mm for precise tracking under load. The tucked in motors, which are new to the GM11GT, make for cleaner lines and easier transport. The G11T mount has a spring loaded worm on the G11 DEC axis only. The Titan RA Axis does not have a spring loaded worm. This GM11GT comes with tried-and-true Gemini 2 GoTo electronics, complete with a 42,000+ object database.

Losmandy GM11GT Equatorial Mount Highlights:


  • The Losmandy GM11GT Gemini 2 Equatorial Mount has a 75 lb weight capacity for imaging, and a 90 lb weight capacity for visual applications
  • Designed, machined, assembled, and performance-tuned in the USA
  • Laser engraved latitude scales and setting circles
  • Precision pointing and tracking
  • 12-72º Latitude range
  • Ships with one piece worm block on both axes
  • Comes with tucked motors
  • Spring-loaded worm added to the RA and DEC axis.
  • The Losmandy GM11GT weighs 64 lbs.
  • RA axis: 6.750" diameter, 270 tooth, 7075 aluminum worm gears - special coated
  • DEC axis: 5.625" diameter, 360 tooth, 7075 aluminum worm gear
  • Dovetail saddle-plate fits both "D" Losmandy and "V" Vixen-style dovetails and allows for the interchanging of any tube assembly; this reduces the need for Dec weights
  • Verified with most modern astronomical/astroimaging systems including Maxim DL, NINA, SGP, Voyager, TheSkyX, Stellarium, Sky Safari, Cartes DuCiel, APT, BYEOS, Nebulosity, etc.
  • Instrument Weight Capacity: 75 lbs. imaging, 90 lbs. visual
  • Includes one 21 lb. counterweight.
  • Includes Gemini II version 5 GoTo Electronics and hand control


Losmandy GM11GT RA Axis Specifications:


  • All machined stainless steel and aluminum, black anodized
  • Shafts, 1.968" diameter stainless steel tubing, .250" wall thickness
  • Worm gears, 6.750" diameter, 270 tooth, 7075 aluminum - special coated
  • Worms, precision ground brass
  • Single piece worm housing construction, double ended, ball bearing supported with adjustable preload
  • Tracking: +/- 5 arcsec or better uncorrected (often +/- 2.5 arcsecond or better corrected)
  • Low temperature operation: 0º F
  • 5.062" diameter needle thrust bearings
  • 3.500" diameter sealed ball bearings
  • 3.100" diameter sealed ball bearings for worm gear
  • Fully locking, unique tangent arm design altitude adjustment, 12-72 degrees, large knob for easy alignment
  • Laser engraved latitude scale in 2 degree increments
  • Single knob azimuth control, bi-directional +/- 10 degrees, X/Y axis leveling bubbles
  • Variable slip clutch, 6.0" diameter both axes, one knob design
  • 360 degree DEC. axis rotation allowing for continuous photographing through the meridian
  • Fully enclosed R.A. and DEC. worm and worm gear
  • Equatorial Head weight 64 lbs. Breaks down into R.A. 46 lbs. & DEC. 16 lbs.
  • Removable stainless steel counterweight shaft with safety stop, 1.25" diameter
  • Split dovetail saddle plate design, Losmandy style 1.00" X 6.00" X 8.00"
  • Dovetail plate drops in and locks allowing for interchanging of any tube assembly - reduces the need for DEC. weights
  • Accepts all "D" series dovetail plates.


Losmandy GM11GT DEC Axis Specifications:


  • All machined aluminum and stainless steel, black anodized
  • All stainless steel hardware
  • One 3.750” diameter needle thrust bearing
  • One 2.000” diameter needle thrust bearing
  • Two 1.500” diameter needle bearings
  • 5.625” diameter, 7075 aluminum worm gear, 360 tooth
  • Dual supported, ball bearing housed ground High Precision Brass Worm
  • Variable slip clutch, both axes. One knob per axis design.
  • 1.250” diameter stainless steel shafts
  • DEC. Axis weight: 16 lbs.


Gemini 2 GoTo Features:

  • Full Color Graphic Touch Screen clearly displays all functions including day, twilight, and night modes
  • Auto color change from dawn to dusk
  • Classic four-button pattern for guiding, centering, moving and slewing on both the touch screen and a tactile membrane on the rear
  • 1 star alignment
  • Multi star modeling for accurate pointing on both sides of meridian
  • 30 arc sec all sky positional accuracy or better
  • For Losmandy GM8, G-11 & Titan mounts
  • Custom mount support using the Programmable Gear Rate function
  • Selectable GOTO, Slewing, Centering and Guiding Rate
  • GOTO rates up to 8 degrees/sec (GM8)
  • DC Servos for improved accuracy with higher torque and smoother tracking than stepper motors
  • Up to 1/2 arcminute GoTo precision
  • All Losmandy equatorial mounts have been hand-tuned at the factory for optimal performance
  • GPS-compatible with optional receiver
  • Stand-alone system. No PC required!
  • Ethernet 10/100 with full IP function permits operation from anywhere using a browser, ASCOM, or APP over the web or serial port
  • Mature reliable drivers for Windows, Mac, Linux including ASCOM and INDI
  • Supports SkyFi, SkyWire, WiFi, and Bluetooth adapters
  • Non-Volatile Memory and Real-Time Clock
  • Internal battery keeps settings and preferences stored between uses
  • English, French, Spanish & German displays
  • Over 42,000 objects
  • Two USB ports; Virtual COM to PC, ASCOM or planetarium program
  • Port F - multi-function serial; A/D I/O
  • Firmware upgrade via internet
  • Unique modular system enables mount upgrades one axis at a time
  • Built-in polar alignment, periodic error correction, and model building wizards
  • Built-in Permanent PEC correction
  • Auto-Guide port (TTL)
  • Auto switch tracking rates
  • User-defined Park function
  • Search function
  • Identify function
  • Polar Align Assist
  • Polar Axis Correction
  • User-defined limit stops
  • Permanent Dec Backlash compensation
  • Electronic Balance Graph
  • Sidereal, King, Lunar, Solar, Terrestrial, Closed loop and Comet/user defined tracking rates
  • Synchronize function
  • Coordinate input
  • Bookmark set for your favorite objects
  • All objects displayed on hand controller are visible
  • 12-18V DC input/output

You can find instructions on Gemini 2 Screen Calibration here.