Losmandy GM-11 Equatorial Mount with Tripod
"The mount came in and all I can say is WOW. What a piece of machinery. I am a mechanical/electrical engineer and I own an industrial machine shop so I know exactly what it takes to make a mount like this. How Losmandy can make a mount of this quality, and sell it profitably at the price I paid is just unbelieveable. It is no wonder to me now that these mounts retain their value as well as they do. I am still in disbelief and am a very happy customer." --Peter Zahn
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, utilizes all stainless steel hardware and has a load capacity of 60 pounds.
The telescope attaches to the mount via a dovetail bar bolted to the bottom of the telescope. Before you attach the optical tube, make sure that the declination and right ascension clutch knobs are tight. This will ensure that the mount does not move suddenly while attaching the telescope. Let's check out the various parts that make up the Losmandy GM11 Equatorial Mount...
Once the telescope is set up, you will need to point it at various locations to observe different objects. Unlike other mounts, the Losmandy mounts have a clutch system. To make rough adjustments, loosen the R.A. and DEC clutch knobs slightly and move the telescope in the desired direction. The R.A. clutch knob is near the Polar Axis Finder while the DEC clutch knob is at the top of the counterweight bar. How tight should the clutch knobs be? You set the clutch knobs to the friction you like. When you want to move the telescope, all you do is grab the telescope and move it to its new position.
Below is pertinent technical information on your Losmandy GM 11 telescope that technophiles may find useful.
Losmandy GM-11 Equatorial Mount and Tripod 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 stainless steel worm-heat treated and ground.
- 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.
- 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.
- Folding Tripod - All machined aluminum, black anodized, powder coated.
- Tripod height, adjustable from 33” - 48”
- Folding, removable leg design for easy transporting.
- Tripod weight 35 lbs.
- 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.
Your Losmandy GM 8 telescope comes equipped with setting circles that translate the celestial coordinates into a precise location for the telescope to point. The daily motion of the Sun across the sky is familiar to even the most casual observer. This daily trek is, of course, not the Sun moving as early astronomers thought, but the result of the Earth’s rotation. This rotation also causes the stars to do the same, scribing out large circles as the Earth completes one rotation.
In order for the telescope to track the stars, you must meet two criteria, First, you need a drive motor that moves at the same rate as the stars. A polar axis finder is offered as an optional accessory. The second thing you need is to set the telescope’s axis of rotation so that it tracks in the right direction. Since the motion of the stars across the sky is caused by the Earth’s rotation about its axis, the telescope’s axis must be made parallel to the Earth’s. The polar axis is the axis around which the telescope rotates when moved in right ascension. This axis points in the same direction even when the telescope moves in right ascension.
Although there are several methods of polar alignment, you will never use all of them during one particular observing session. Instead, you may use only one if it is a casual observing session. Or, you may use two methods, one for rough alignment followed by a more accurate method if you plan on doing astrophotography.
Losmandy Product Number: GM11S
- Additional Information
SKU LO-G11S Head Design Equatorial Tripod or Pier Included? Yes GPS Included? No Electronics Included Motorized - Dual Drive Manufacturer Losmandy Warranty 1 Year Warranty Hand Controller Included Losmandy Motor Controller # of Counterweights Included 1 Weight of Counterweights 21 lb. Tracking Rates Lunar, Sidereal, Solar Objects in Database N/A Mount Special Features Dimmer On Control Panel, Illuminated Control Panel 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.
- Included Items
- Losmandy G-11 Equatorial Mount
- Folding Tripod
- Small hand control box
- Tiltable control panel
- Control panel dimmer
- Periodic Error Correction (PEC)
- Through the axis polar scope
- 21 lb counterweight
- Removable stainless steel weight shaft w/safety knob
- Dovetail saddle-plate
- 160 oz/in stepper motor
- Laser engraved setting circles
- Laser engraved latitude scale
- Single knob azimuth control
- Questions & Answers
Product QuestionsI know it is not go to. Can I plug into a computer so the computer finds what I would like to look at?Question by: wampier on Oct 25, 2016 7:39:00 PMGood afternoon and thanks for asking. Unfortunately you cannot. To get computer controlled goto capability in a mount with the same weight capacity you would need to get the G11 with the Gemini 2 system. https://www.optcorp.com/losmandy-g-11-equatorial-mount-w-gemini-2-goto-system-folding-tripod.htmlAnswer by: Charles Walker (Admin) on Nov 1, 2016 12:47:00 PM
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