Unveiling iOptron's GEM28—a next-gen German equatorial mount that's both compact and cutting-edge! Designed to be super portable, this 10-pound wonder can handle a hefty 28-pound payload. That's a nearly 3:1 payload-to-weight ratio, thanks to tech borrowed from our CEM mount series. Plus, the German EQ model is built to work beautifully at higher latitudes and will be a hit with fans of more classic mount styles.

What's new, you ask? Well, we've added a bunch of cool stuff. Think positive lock gear that’s glove-friendly, onboard Wi-Fi for seamless connectivity, and permanent periodic error correction (PPEC) that you can record and play back for optimal tracking performance. When it comes to precision and tracking, the GEM28 is an absolute beast.

Dive into stargazing or astrophotography with our advanced GOTONOVA® GOTO tech. With a massive library of 212,000 celestial objects and an intuitive Go2Nova® Hand Controller that sports a big 4-line LCD, your night sky exploration just got a lot easier.

The GEM28 also includes an AccuAlign™ optical polar scope for quick polar alignment. And to hold it all up, we’ve thrown in a solid 1.5-inch stainless steel tripod.

Shipping Details:

Box #1: GEM28 Head with AccuAlign and Tray (G281B)
Box #2: 1.5-inch Tripod without Tray for CEM26/GEM28 (C26/G28 1.5T)

Feature Highlights:

German equatorial layout with a latitude scope of 10° to 70°
A dream for visual astronomy and astrophotography
Low periodic error of less than ± 12 arc seconds
Mount-only weight of 10 lbs supporting a 28 lb payload
Crafted from CNC-machined and cast metal
Spring-loaded gear mechanics
Easy-to-operate quick-lock gear clutches
Energy-efficient stepper motor
AccuAlign™ polar scope pre-calibrated
Alternative polar alignment routine if you can’t see the North Star
Go2Nova® 8409 hand controller with top-tier GOTONOVA® GOTO capabilities
Integrated ST-4 port for autoguiding
Inbuilt Wi-Fi and USB ports for firmware and computer interfacing
Comes with a standard 1.5-inch, 5kg heavy-duty stainless steel tripod
Die-cast metal tripod spreader and accessory tray included
Options for a sturdy carrying case, 32-channel GPS, and iGuider™ autoguiding system (#3360) available

Get ready to redefine what you expect from a compact German equatorial mount. The GEM28 is where tech meets tradition, and it's a game-changer.

Specifications

Mount	German Equatorial Mount
Payload *	28 lbs (12.7kg), exclude counterweight
Mount weight	10 lbs (4.5kg)
Payload/Mount weight	2.80
Structure Material	All metal, Casting + CNC machined
Exterior Finish	Powder coating
Periodic error (PE) **	<±12 arcsec
PEC	Yes, Permanent PEC
Worm period	600 sec
Right Ascension worm wheel	Φ88mm, 144 teeth aluminum
Declination worm wheel	Φ88mm, 144 teeth aluminum
Right Ascension axis shaft	Φ35mm steel
Declination axis shaft	Φ35mm steel
Right Ascension bearing	Φ55mm ball bearing
Declination bearing	Φ55mm ball bearing
Worm gears	Φ15.2mm, Brass
Motor drive	1.8º stepper motor, 128X microdivision
Resolution	0.17 arc seconds
Transmission	Synchronous belt
Latitude adjustment range	10º ~ 70º
Azimuth adjustment range	± 6º
Polar Scope	AccuAlign^TM optical polar scope
Level indicator	Level bubble
Hand Controller	Go2Nova® 8409 with ~212,000 objects database
Tracking	Automatic
Slew speed	1×,2×,8×,16×,64×,128×,256×,512×,MAX(6º/sec)
Power consumption	0.6A(Tracking), 0.9A(GOTO)
Power requirement	12V DC, 5A
AC adapter	100V ~ 240V (included, for indoor use only)
Power-down memory	Yes
Wi-Fi	Built-in
Communication port	Yes (Wi-Fi and USB)
Autoguide port	Yes (ST-4 compatible)
Firmware upgrade	Yes
PC computer control	Yes (ASCOM)
Counterweight shaft	Φ20X200mm (M16), Stainless Steel
Shaft extension	Φ20X120mm (M16), Stainless Steel
Counterweight	10 lbs (4.5kg)
Tripod	1.5" Stainless Steel (5kg)
Dovetail saddle	3.8" Vixen-style, center adjustable
Carrying case	Optional
GPS	Optional external 32-channel GPS
Autoguiding	Optional external iGuider 1
Operation temperature	-10ºC ~ 40ºC
Warranty	Two year limited

* OTA size and length dependent, smaller than 6" in diameter recommended
** Measured with encoder on bench, 10 minutes

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iOptron GEM28 w/ AccuAlign/1.5T

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