Losmandy GM811GHD Equatorial GoTo Mount with FHD-MA Tripod

Losmandy GM811GHD Equatorial GoTo Mount with FHD-MA Tripod

Losmandy GM811GHD Equatorial GoTo Mount with FHD-MA Tripod


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Expected availability: 7-14 business days

Product Highlights

  • Motorized Computer-Controlled EQ Mount
  • 50-Pound Total Payload Capacity
  • Precision Dual-Axis Servo Motors
  • Gemini 2 GoTo Hand Controller
  • 40,000+ Object Database
  • Multi-Star Assisted Alignment
  • Permanent PEC, Dec Backlash Compensation
  • Multiple Slew, Tracking, Guiding Rates
  • Dual Losmandy/Vixen Dovetail Saddle
  • Heavy-Duty Adjustable-Height Tripod
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Losmandy GM811GHD overview

  • 1Description

Ideal for long-exposure astrophotography and imaging, Losmandy's GM811G Equatorial GoTo Mount provides users with a highly portable platform built to support and move optical tube assemblies (OTAs) and gear with precision. With a total payload capacity of 50 pounds, excluding counterweights, the mount can precisely track the more than 40,000 objects in its database for extended periods of time with little vibration.

All hardware is made of stainless steel to handle the weight as well as resist wear over years of use, while a dual dovetail saddle will accept the common Vixen-style plates and the larger Losmandy D-style plates. Its dual-axis DC servo motors are smoother and more precise than the more common stepper-type motors and are reversible for use in the Northern and Southern Hemispheres. This version of the GM811G comes with a heavy-duty adjustable-height tripod that is made of machined aluminum with a black anodized finish that matches the mount head. It has a height range from 33 to 52 inches, and weighs a hefty 35 pounds for stability and superior vibration reduction.

The brain of the G11GT system is Losmandy's Gemini 2 computer hand controller. Equipped with a 40,000+ object database and updatable via the Internet, it sports a full-color display, an intuitive user interface, and an Ethernet 10/100 port for remote PC control. It features Periodic Error Correction (PEC) and declination-axis backlash correction to improve tracking accuracy and precision, with smooth tracking over long periods of time. Alignment assistance is available by selecting at least two bright stars, with the option of aligning to more stars for improved GoTo and tracking accuracy as desired. Multiple guide, slew, and tracking rates allow it to be easily aligned and manually controlled and to accurately track near- and deep-sky objects. A non-volatile memory and real-time clock preserve settings, including backlash correction and PEC, when the system is turned off and power disconnected.

  • Machined aluminum and stainless steel
  • Scratch-resistant and reflection-limiting black anodized finish
  • All stainless steel hardware resists wear
  • 50-pound payload capacity
  • Altitude adjustment range: 0-68° with locking tangent arm
  • Laser-engraved latitude scale in 2° increments
  • Single knob azimuth control with ±8.5° travel
  • Dual dovetail saddle accepts large Losmandy D-style or standard Vixen-style plates
  • Removable 1.25" diameter stainless steel counterweight shaft with 11-pound counterweight
  • Tiltable control panel for easy access
  • Optional Northern Hemisphere polar alignment scope
  • 12-18 VDC, 500mA power requirement
Motors and Gears
  • Dual-axis DC servo motors are smoother and more precise than the more common stepper
  • Reversible motors for use in Northern and Southern Hemispheres
  • All machined aluminum and stainless steel to resist wear
  • Variable-slip clutches for manual use
Right ascension axis:
  • One 3.75" diameter needle thrust bearing
  • One 2" diameter needle thrust bearing
  • Two 1.5" diameter needle bearings
  • 5.625" diameter, 360 tooth, 7075 aluminum worm gear
  • 1.25" diameter stainless steel shaft
Declination axis:
  • One 2.1" diameter needle thrust bearing
  • One 2" diameter needle thrust bearing
  • Two 1.5" diameter needle bearings
  • 2.812" diameter, 180 tooth, 7075 aluminum worm gear
  • 1.25" diameter aluminum shaft


Gemini 2 GoTo Hand Controller
  • Full-color graphic touch screen clearly displays all functions
  • 40,000+ object database
  • Multi-star alignment assistance; requires at least two stars for initial alignment with option for more stars to improve alignment, GoTo, and tracking precision
  • Tracking rates: Sidereal, Solar, Lunar, King's
  • Periodic Error Correction (PEC) improves tracking precision over time
  • Declination backlash compensation allows users to program out intrinsic play between gears for smoother and more precise tracking
  • Northern and Southern Hemisphere modes
  • Auto-guider port
  • Control panel dimmer
  • Non-volatile memory and real-time clock preserve settings when turned off and power disconnected
  • Ethernet 10/100 with full IP function permits operation from anywhere using a browser, ASCOM, or app over the web or serial port
  • Supported languages: English, German, French, and Spanish
  • Firmware upgrade via Internet
  • Dual 12-18 VDC input/output (3.0A) for accessories
  • Database:
  • Solar system: Planets, Sun, Moon
  • Bright Star List (BSL)
  • Named constellations and stars
  • IC Catalog
  • Lynds' Catalog of Bright Nebulae
  • Lynds' Catalog of Dark Nebulae
  • Messier Catalog
  • NGC Catalog
  • Strasbourg-ESO Catalogue of Galactic Planetary Nebulae
  • Smithsonian Astrophysical Observatory Star Catalog
  • Sharpless Catalog 2
  • Southern constellations and stars
  • Washington Double Star Catalog
  • User defined
  • Maximum payload capacity: Carries up to 425 pounds
  • Machined aluminum with scratch-resistant black anodized finish
  • Adjustable height from 33 to 52" to accommodate a variety of users and viewing positions
  • Independently adjustable leg angle with position locks
  • Large locking knobs for leg sections enable the legs to be firmly set in place even when wearing gloves
  • Large and heavy construction to provide stability and vibration reduction
  • Folded completely with legs fully retracted: 39x14x14"
  • Weight: 35 pounds
UPC: 851868007744
In the Box
Losmandy GM811GHD Equatorial GoTo Mount with FHD-MA Tripod
  • Gemini 2 Hand Controller
  • Counterweight Shaft
  • 11-lb Counterweight for GM-8, G-9, G-11 and Titan Mounts
  • FHD-MA Tripod
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Losmandy GM811GHD specs

    Mount Type Motorized German equatorial
    Load Capacity 50.0 lb / 22.7 kg
    Motor Dual-axis servo motor
    ±0.5 arcsec resolution
    Counterweight 1 x 11.0 lb / 5.0 kg
    Mount Dual Losmandy and Vixen-style dovetail saddle
    GoTo Capability Gemini 2 computer hand controller
    Altitude / Latitude Adjustment Altitude: 0 - 68°
    Latitude: 2° incremental scale
    Polar Axis Scope Optional
    Includes Tripod/Pier Aluminum with anodized finish
    Adjustable height from 33.0 - 52.0" / 83.8 - 132.1 cm
    Folded size: 39.0 x 14.0 x 14.0" / 99.1 x 35.6 x 35.6 cm
    Weight: 35.0 lb / 15.9 kg
    Power Source 12 VDC, 500 mA power supply
    Weight Head: 27.0 lb / 12.2 kg
    Tripod: 35.0 lb / 15.9 kg
    Packaging Infoaqstwfrybruqdyvczqbdeeav
    Package Weight 40.15 lb
    Box Dimensions (LxWxH) 41.0 x 15.0 x 15.0"

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