Losmandy G11T Equatorial Mount with Gemini 2 GOTO and HD Tripod

Product Overview

The Losmandy G11T is a precision German equatorial mount built around a Titan RA axis paired with a G11 DEC axis, supplied with the Gemini 2 GOTO servo system, a counterweight shaft, one 21 lb counterweight and the folding heavy-duty tripod. Losmandy publishes an instrument capacity of 75 lb for imaging and 90 lb for visual use. The RA axis carries a 6.75-inch, 270-tooth 7075 aluminium worm gear and the DEC axis a 5.625-inch, 360-tooth gear, with uncorrected tracking rated at ±5 arcseconds or better and corrected periodic error often at ±2.5 arcseconds or better.

Who It's For

This is a good match if your imaging train has outgrown a 60 lb mount, or if you are building toward a large refractor or astrograph and want the capacity in place from the start. The 75 lb imaging figure is the highest in Losmandy's G-series line. It suits an observatory or a permanent pier — at 46 lb for the RA axis alone this is not a mount that gets carried out casually — and it suits an observer who wants Titan-class RA in a package that still uses the standard G11 accessory ecosystem.

Key Features & Design

• 75 lb imaging / 90 lb visual instrument capacity — the highest published figures in the G-series.
• Titan RA axis: a 6.75-inch, 270-tooth 7075 aluminium worm gear, larger in diameter than anything else in the line.
• G11 DEC axis: a 5.625-inch, 360-tooth 7075 aluminium gear.
• Dual-supported, ball-bearing-housed ground high-precision brass worm.
• ±5 arcsecond or better uncorrected tracking, with corrected periodic error often at ±2.5 arcseconds or better.
• Built-in permanent periodic error correction.
• Gemini 2 GOTO: DC servo motor based computerised positioning, with GOTO accuracy published at up to half an arcminute.
• Head weight 46 lb RA and 16 lb DEC, supplied on the folding HD tripod.
• Supports altitudes from 12° to 72°, and runs on 12–18 V DC.

Mechanical Design

The G11T is the combination mount in Losmandy's range: Titan RA, G11 DEC. RA is the axis that does the tracking work during an exposure, so that is where the larger gear earns its place — 6.75 inches in diameter against the G11G's 5.625. The DEC axis keeps the 5.625-inch, 360-tooth G11 gear, which is doing a different and less demanding job.

Both axes use the dual-supported, ball-bearing-housed ground brass worm found across the line, and periodic error correction is stored permanently in the mount rather than re-trained each session. One specification worth noting against the rest of the family: the published altitude range is 12° to 72°, where the G11G and GM811G are rated 0° to 68°.

Recommended Uses

Long-exposure deep-sky imaging with a large refractor, astrograph or SCT and a full imaging train. Observatory and permanent-pier installations. Visual observing with large instruments up to the 90 lb visual rating. Remote and automated operation through Gemini 2. Work where RA tracking quality is the binding constraint rather than payload alone.

Compatibility and Accessory Notes

Saddle: takes the Losmandy saddle plate that accepts both D-series and Vixen-style V-series dovetail plates. We stock the D-series universal plates in 14", 19" and 24" lengths.

Counterweights: one 21 lb weight is included, with 7, 11 and 21 lb sizes available separately.

Pier and tripod: supplied on the folding HD tripod. The MAL tripod/pier adapter is the one machined for the G11T and Titan mounts, and it also sits on permanent piers. A MAL-to-MA adapter is available if you need to mate it to an MA-pattern support.

Polar alignment: the iPolar electronic polar scope fits the polar scope port with the G11/G11T iPolar adapter. The HGM TPS polar scope is the optical alternative for this mount.

Power: 12–18 V DC.

Good to Know Before You Order

The RA axis alone is 46 lb. With a 16 lb DEC axis, a 35 lb tripod and a 21 lb counterweight, this is an installation rather than a grab-and-go. Plan for a pier, an observatory or a fixed pad.

Published altitude range is 12° to 72°, narrower at the bottom end than the G11G's 0°. Not a constraint anywhere in Canada, but worth knowing if you travel to low latitudes.

Tracking figures are Losmandy's published specifications. Actual results also depend on balance, polar alignment and seeing.

Pier extensions are available for the G11T/MAL adapter in 4", 8" and 12" lengths if you need to clear a tripod leg or a dome wall.

Frequently Asked Questions

Is it difficult to set up?

Mechanically it is the same routine as any Losmandy German equatorial — head onto the support, shaft and weight, balance, polar align — but the weight makes it a two-stage job. Most owners set it on a pier or a fixed tripod position and leave it there. The Gemini 2 handles pointing from its hand controller.

How is this different from the G11G?

The RA axis. The G11T uses the Titan 6.75-inch, 270-tooth RA gear where the G11G uses 5.625-inch, 360-tooth, and the published imaging capacity rises from 60 lb to 75 lb. The head is heavier — 46 lb RA plus 16 lb DEC against 33 lb total — and the altitude range differs.

Can I buy just the Titan RA axis?

Yes. We list the Titan RA axis separately for use with a G11 DEC, without a motor, if you are upgrading an existing mount rather than buying complete.

Does it need a computer?

No. Gemini 2 runs as a self-contained GOTO system from its hand controller, and can be computer-driven if you want that.

Bottom Line

Titan RA on a G11 DEC: 75 lb imaging capacity, a 6.75-inch 270-tooth RA gear, permanent periodic error correction and Gemini 2 GOTO on the folding HD tripod. The most capable mount in Losmandy's G-series, and one that wants a permanent home.