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Losmandy GM-8 Gemini 2 Equatorial Mount w/LW Tripod

5.0 out of 5 stars
2 customer reviews


SPECIFICATION: R.A. / DEC. AXIS

  • All machined aluminum and stainless steel, black anodized.
  • All stainless steel hardware.
  • 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. One knob design.
  • 1.250" diameter aluminum shafts.
  • Fully locking, unique tangent arm design altitude adjustment, 0-64 degrees, large knob for easy alignment.
  • Laser engraved latitude scale in 2 degree increments.
  • Single knob azimuth control, bi-directional +/- 8.5 degrees.
  • 3.500" diameter laser engraved setting circles 6 minute R.A. / 2 degrees DEC. R.A. circle engraved for Northern and Southern Hemisphere.
  • Porter slip ring design.
  • 160 oz/in stepper motor, 1.0 arc sec. step.
  • Spit Dovetail saddle-plate design. Accepts "D" series dovetail plates. Dovetail plate drops in and locks allowing for interchaning of any tube assembly, reducing the need for DEC weights.
  • Removable stainless steel weight shaft w/safety knob.
  • 7 lb counterweight.
  • 11 lb and 21 lb. extra counterweights available.
  • Through the axis polar scope, works in Northern and Southern hemisphere. Polar scope optional.
  • Instrument weight capacity 30 lbs.
  • Equatorial head weight 21 lbs.


LW TRIPOD

  • All machined aluminum, black anodized.
  • Tripod height, adjustable from 27" - 43"
  • Fold-up tripod design for easy transporting.
  • Tripod weight 15 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 and super fast 32x HST (high speed transfer).
  • 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 9" @ 34 degrees to center of Dec.-R.A. junction. Add 6" from Dec.-R.A. junction to top of saddle.

GEMINI 2 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
  • English, French & German displays
  • Over 40,000 objects
  • 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 (3.0A)


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Customers Reviews

Total 2 reviews
5.0 out of 5 stars

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Most Helpful Customer Reviews

Solid well designed goto mount - needs better tripod

By Michael Corrieri on October, 17th 2009

After a small learning curve I love my Losmandy GM-8 Gemini mount. The Gemini system is very accurate, and allows using up to 250 alignment objects - increasing the precision manyfold. The mount is well designed, and extremely smooth tracking. The stability could be enhanced by a better tripod - the G-11 tripod is an excellent match for this mount. The GM-8 tripod is pretty wobbly - although you can stablize it by torquing the bolts. Overall I would say this is one of the better mounts available, bringing a great Goto system to a lightweight, sturdy, accurate, and very smooth mount.

A Good quality Mount!

By James A. Edwards on October, 17th 2009

I opted for a GM-8 as a solid EG mount for my newly aquired 120mm refractor...Having owned 2 G-11s one not being a go-to, I decide to upgrade to the Gemini as I enjoy having this option...First thing out of the box was its quality...Black polished aluminum, machining was exceptional and overall a solid well built mount...The go-to took some getting used to but worked very good then when coupled with a lap top, I had it working flawlessly...My only complant is the added cost for accessories...They all serve a very good purpose but should have been include...Overall a very good mount and a wise investment! J.E.

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