Meet iOptron's latest innovation in compact German equatorial mounts: the GEM28! Taking inspiration from its predecessors, the GEM28 is engineered for portability. Weighing just 10 lbs, it's capable of supporting a hefty 28-lb payload. That's a stunning 2.8-to-1 mount weight-to-payload ratio! We made this possible by applying weight-reduction techniques from our renowned CEM mount series. If you're a fan of traditional German EQ mounts and require higher latitude functionality, the GEM28 is for you.

We've taken the best of our earlier GEM models and leveled up. Added perks include a positive lock gear engagement system that's glove-friendly, built-in Wi-Fi for seamless connectivity, and recordable Permanent Periodic Error Correction (PPEC) for reusing optimal PEC training settings. When it comes to performance, the GEM28 offers spot-on pointing and stable tracking, setting a new benchmark for compact German equatorial mounts with goto capabilities.

Under the hood, the GEM28 is loaded with our most advanced GOTONOVA® GOTO tech, making it a powerhouse in accurate target locating. With a library boasting 212,000 celestial objects, you'll never run out of things to observe or photograph. Plus, the Go2Nova® Hand Controller is user-friendly, featuring a generous 4-line LCD screen that makes setting up and navigating a breeze.

The GEM28A version comes with an integrated electronic polar finder called iPolar, ensuring precise telescope alignment even when Polaris is hidden from view. Package it with a robust LiteRoc stainless steel tripod and an aluminum carrying case, and you're ready to go!

📦 What's in the Box?

Shipping Box #1: GEM28 Head with iPolar, Case, and Tray (Model: G282A)
Shipping Box #2: LiteRoc Tripod without Tray (Model: C26/G28 LiteRoc)

🌟 Key Features

German equatorial design with a latitude range of 10° to 70°
Suitable for visual observations and astrophotography
Low periodic error (< ± 12 arc seconds)
Payload capacity: 28 lbs, mount-only weight: 10 lbs
Body crafted from CNC machined and cast metal
Spring-loaded gear mechanism
Quick-lock gear clutches that are easy to operate
Energy-efficient stepper motor
Integrated iPolar™ electronic polar scope
Go2Nova® 8409 controller with Advanced GOTONOVA® GOTO Technology
ST-4 autoguiding port
Built-in Wi-Fi via the hand controller
USB port for firmware updates and computer control
Heavy-duty LiteRoc stainless steel tripod (weight: 7.5kg)
Die-cast metal tripod spreader with an accessory tray
Secure aluminum carrying case
Optional 32-channel GPS
Optional iGuider™ autoguiding system (#3360)

With all these features, the GEM28 is setting a new standard for what a compact, portable, and high-performance mount can offer.

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	iPolar ^TM electronic 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 requiremention	12V DC, 5A
AC adapter	100V ~ 240V (included, for indoor use only)
Power-down memory	Yes
Wi-Fi	Built-in (via hand controller)
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	LiteRoc heavy-duty stainless steel tripod (7.5kg)
Dovetail saddle	3.8" Vixen-style, center adjustable
Carrying case	Included
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 with iPolar in Hard Case and LiteRoc Tripod

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