Losmandy G-11 Equatorial Mount w/ Gemini 2 GoTo System & Folding Tripod

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Losmandy G-11 Equatorial Mount w/ Gemini 2 GoTo System & Folding Tripod
Item # LO-G11G2
  • The Gemini 2 GoTo System has been designed with a more powerful CPU, more memory and an interactive color touch screen for versatility and ease of use.
  • The Losmandy G11 Gemini Equatorial Mount is made of black anodized, machined aluminum and stainless steel.
  • The Losmandy Gemini 2 GoTo System uses a super accurate system and has a GoTo database of over 4,000 objects.
  • Losmandy G11 Gemini EQ Mount weight capacity is 60 lbs.
  • Accurate, fast servo motors on the Gemini 2 System deliver slew speeds of up to 8 degrees per second!
  • One 21 pound counterweight included.


Losmandy G11 Gemini Computerized Equatorial Mount

If you're tired of messing around with equatorial mounts that just can't handle your observing and imaging requirements, the Losmandy G-11 is definitely worth a look. This heavy-duty mount is machined of aluminum and stainless steel, employs high precision gears and sports all stainless steel hardware. The Losmandy G-11 will handle a load capacity of 60 pounds, and this model comes with the Losmandy Gemini 2 GoTo System, complete with servo motors that deliver slewing rates of up to 6 degrees per second and an online database of over 40,000 objects. Below you'll find specifications on the G-11 mount itself, and below that, a write up on the Gemini GoTo System.

Losmandy G-11 Equatorial Mount 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 design.
  • 1.250” diameter stainless steel shafts.
  • Fully locking, unique tangent arm design altitude adjustment, 14-64 degrees, large knob for easy alignment. (8-68 degrees with small modification).
  • Laser engraved latitude scale in 2 degree increments.
  • Single knob azimuth control, bi-directional +/- 8.5 degree.
  • 5.000" diameter laser engraved setting circles, 4 minute R.A., vernier reading to 1 minute / 1 degrees DEC., vernier reading to 0.1 degree. R.A. circle engraved for Northern and Southern Hemisphere.
  • Porter slip ring design.
  • 160 oz/in stepper motor, 0.5 arc sec. step.
  • Dovetail saddle-plate allows for the interchanging of any tube assembly-reduces need for DEC. weights.
  • Removable stainless steel weight shaft w/safety knob.
  • 21 lb counterweight - Optional 7 lb and 11 lb extra counterweights available.
  • Through the axis polar scope, works in Northern and Southern Hemisphere. Polar scope optional.
  • Instrument weight capacity 60 lbs.
  • Equatorial head weight 36 lbs.
  • Tripod: Folding, all machined aluminum, black anodized, powder coated.
  • Tripod height, adjustable from 33” - 48”
  • Removable leg design for easy transporting.
  • Tripod weight 35 lbs.
  • Dual Axis Electronics: Diamond push button pattern.
  • R.A. and DEC. reversing switches.
  • Three guiding rates - 30%, 50% and 2x sidereal rate.
  • Three setting rates - 4x, 8x, 16x sidereal rate.
  • Quartz tracking rates: sidereal, solar, lunar, king.
  • Periodic Error Correction (PEC).
  • Programmable DEC. Backlash Compensation (TVC).
  • Control panel dimmer.
  • Accepts auto-guider systems.
  • Northern and Southern Hemisphere operation
  • 12 volt DC - 500ma power use.
  • Tiltable control panel for easy access.
  • Small hand control box for comfortable use.
  • All heights are to top of tripod. Add 10” @ 34 degrees to center of Dec.-R.A. junction. Add 7” from Dec.-R.A. junction to top of saddle.

Losmandy Gemini 2 GoTo System...

The Losmandy Gemini 2 system is a DC servo motor based GOTO computerized positioning system designed for the Losmandy HGM-TITAN, G-11 and G-8 mounts. The Gemini 2 system has many features designed to quickly and accurately point the telescope to an object, then track it with even higher precision than the previous digital stepper drive used by Losmandy. The choice of servo motors gives two main advantages over stepper motor based systems. Servo motors run with a continuous smooth rotation, rather than discreet steps as with stepper motors. They also have very high torque, even at high slewing speeds. As a result the Gemini 2 system can deliver up to 8 degrees per second slewing rates with the G-8 mount, 6 with the G-11 and 5 with the HGM-TITAN.  

Gemini 2 can be used as a stand alone system in the field. It can be powered by any 3A, 12-18 Volt DC source. No personal computer is required. A user brightness adjustable Touch Screen Display allows navigation through all internal databases for field use without a PC. The following databases comprising of over 40,000 objects are built into the Gemini system, more than enough to keep even the most avid observer busy for some time!

  • 168 BSL.guc
  • 303 Combined_Constellation_Stars.guc
  • 5437 IC.guc
  • 1125 LBN.guc
  • 1787 LDN.guc
  • 110 Messier.guc
  • 8290 NGC.guc
  • 1143 PN.guc
  • 17636 SAO.guc
  • 313 Sh2.guc
  • 223 Southern_Constellation_Stars.guc
  • 3988 WDS.guc

The Gemini 2 system has an impressive list of features:

  • 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
  • For Losmandy GM8, G-11 & Titan mounts
  • Custom mount support using the Programmable Gear Rate function
  • 8°/sec Slew Rate (GM8)
  • 0.5 arcsec positional accuracy
  • DC Servos for improved accuracy with higher torque than stepper motors
  • 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
  • Non-Volatile Memory and Real-Time Clock
  • 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
  • Firmware upgrade via internet
  • PEC correction
  • Auto-Guide port (TTL)
  • Dual 12~18V DC input/output (1.5A)

A new Touch Screen Hand Controller is now standard for all Gemini 2 systems. The hand paddle features membrane switches with provide excellent tactile feedback, while centering or moving of the telescope when at the eyepiece. The display works in parallel to the main electronics, allowing users to access all of the main panel functions via the Touch Screen Display.

Gemini 2 uses a Meade LX200 command sub-set, with most LX200 commands being implemented. The user can update the internal real time clock via a GPS unit, as well as user location information. Coupled with The Sky by software Bisque and CCD camera, users can confidently determine the positions of minor planets and comets, and place them on a CCD detector time and time again.

The Gemini 2 design incorporates surface mounted PC board technology for reliable performance in the field. The main control board also has auto-guider and accessory ports to allow full remote control of the system via a Web server from anywhere in the world. (Gemini 2 has been successfully tested with Software Bisques IAS server software).

The Gemini 2 system has built in "T-Point" like pointing software that can use from one to many stars to refine its pointing accuracy. With multi-star modeling pointing accuracy has been measured to within three arc minutes around the entire sky, and to less than one arc minute with short slews from an updated position located within a few degrees of a reference object. Gemini 2 is also fully T-Point (Software Bisque) compatible. Extended personal computer based T-Point modelling runs can give better than 1 arc minute positioning accuracy across the entire sky! Further, with Gemini's warm re-start option, previously stored PC T-point data can be reused without the need to conduct a short mapping run.

How accurate is Gemini?

Pictured is a T-Point summary of a 60 star mapping run with a Losmandy mount fitted with Gemini 2. Note the Sky RMS pointing of 26.27 arc seconds. While some manufacturers claim incredible accuracies with their GoTo systems, few will actually state actual results as shown above. While single star alignment assumes that your Losmandy mount is accurately polar aligned, the Gemini 2 system only requires rough polar alignment to deliver excellent pointing accuracy across the entire sky using multi-star alignment models.

Losmandy Product Number: G11G2

Additional Information

Additional Information

Head Design Equatorial
Tripod or Pier Included? Yes
GPS Included? No
Electronics Included Computerized - GoTo
Manufacturer Losmandy
Warranty 1 Year Warranty
Hand Controller Included Losmandy Gemini 2 Touchscreen
# of Counterweights Included 1
Weight of Counterweights 21 lbs.
Tracking Rates Lunar, Sidereal, Solar
Objects in Database 40,000 +
Saddle Width D Series
Weight Capacity 60 lbs.
Leg Length 33" - 48"
Material Aluminum
Power Supply Included DC Battery Adapter
Tracking Modes EQ North, EQ South
Latitude Range 14º - 64º
Weight of Tripod/Monopod 35 lbs.
Weight of Head 36 lbs.

Customer Reviews 6 item(s)

Good performing mount for its price tag
I owned the GM8 (no Goto) and subsequently purchased a new G11 G2, all I can say is I love the quality. Though its not as accurate as a AP, but at a much lesser price tag and shooting at lower focal length this is a very pleasant mount to use.
Only downside is the Motor gets hit when it too far west. And the HD tripod is difficult to transport. So I sold the legs and bought a AP 24" pier. works like a charm.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Shirox / (Posted on 4/24/2013)
Excellent workmanship and works like a charm.
This mount is an excellent choice for astrophotography and even for viewing applications. While there was a learning curve, it only took a couple nights before I was up and shooting. As far as the limited amount of documentation/instructions, this is a fair critique of the unit. However, I would suggest a video to be made which explains the operation of the basic features. Included in this video there should be an overview dealing with terms which you will come across on the YahooGroup. This would put everyone on the same page and would reduce the learning curve to novices such as myself considerably. As for the mount, it has performed flawlessly. I photograph in widefield so my demands are not as strenuous as longer focal lengths, but I have no doubt this mount is capable of a lot more. While not cheap it definitely is a bang for your buck when compared to all the other pricey mounts. I have now owned mine for nearly 18 months, and I do not regret my purchase at all. I am very satisfied with the performance and highly recommend it.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Glen / (Posted on 4/16/2013)
Losmandy G11 Gemini II
The mount is sturdy, it carries and guides a load of 21 pounds very well for astrophotography. I no longer throw away subs because of tracking errors even guiding at a focal length of 1625mm. The Gemini II is well under way in its development. Guiding and GoTo works very well after polar alignment and building a model. The downside to this mount is lack of documentation for the Gemini II. There is a YahooGroup that is very up to date and a huge help. I probably would still use the user group more even if I had a users manual, but for the price of the mount a users manual should be included. Overall, I would recommend this mount to anyone looking for a midrange mount.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Steve / (Posted on 3/25/2012)
Preliminary Report
I have unpacked and set up the G-11, but it has been too cloudy to try out.
The mount is well made and sturdy as a tank.
My problem concerns the poor documentation for some aspects of setting up the mount, and especially the almost nonexistant documentation for the Gemini 2. I joined the Gemini 2 yahoo group and learned that the firmware for the Gemini 2 is still in beta test. So beware if you are a novice like me. I ordered the HC hand controller as several group members suggest so that I can use it as a non-goto while waiting.
I will update my report as time goes on.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by John / (Posted on 6/12/2011)
The Losmandy G11 Gemini has become a leader in the field of computerized EQ mounts. Out of the box they perform to very high standard but the simplicity of this design and being able to service it myself makes it invaluable to me. The craftsmanship of this mount stands very much alone as only mounts at twice this price will show that type of detail. This mount has proven itself time and time again that's why I bought a second one just for the field.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by John Downs / (Posted on 7/26/2007)
A sturdy performer
As I've gotten deeper into astrophotography, I've become convinced that the most important part of any imaging system is a stable mount. The best optics and cameras can only do so much when your mount flexes in the breeze or when someone simply walks by.

One word comes to mind with the Losmandy G-11 Gemini: Utilitarian. It's not pretty, and the computer system takes some getting used to, but it does its primary job of carrying my telescope and CCD camera across the sky with consistency and precision. For visual use, the G-11 will haul a 50 lb 14 SCT around without issue, but for imaging I recommend a maximum weight of 30-40 lbs for scope and camera gear combined.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by HC / (Posted on 7/18/2007)
Included Items

Included Items

  • G11 Mount Head
  • Folding Tripod Legs
  • Collar
  • Gemini 2 System
  • 21 lb. Counterweight
  • Hardware
Questions & Answers

Product Questions

Can the head be left outside on stationary pier with some waterproof hood on? Eg. does it endure winter, rainy days and sun? Or any other suggestion (excluding dome) how this could be left installed permanently?
Does it come with a polar scope ? Also, instead of a one 21 lbs counter weight, can we get 7/14 combination weights no additional charge ?
Does this have the new Gemini-2 mini control box?
I have read about the 76 second error due to the worm block on many forums. From my understanding this is due to the two piece worm block? This model (Gemini 2) G-11 use a newer one piece worm block? I am looking for an AP ready mount without having to buy the Ovision worm...
Will the G-11 function well with an AP  152mm  f/12? 
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