Introducing iOptron’s new compact next-generation German equatorial mounts the GEM28!

Like their predecessors, the GEM28 is designed with portability in mind, weighing in at only 10 lbs it can support up to a 28lb payload an incredible 2.8 mount weight to payload ratio. We achieved this using design methods developed to reduce mount mass in our CEM family of mounts. The German EQ versions were created to satisfy consumer that prefer a more traditional mount and to function at higher latitudes.

Building on the legacy of earlier GEM models we have added features for convenience and functionality. A positive lock gear engagement system (easy to use even when wearing gloves), Built-in Wi-Fi enabling unparallel connectivity and recordable permanent periodic error correction (PPEC) to repeat optimal PEC training sessions. Regarding functionality the GEM28 delivers precise pointing and accurate tracking. The GEM28 sets the new standard for compact German equatorial goto mounts.

The GEM28 is equipped with the latest advanced GOTONOVA® GOTO technology, making it one of the most powerful and accurate GOTO mounts available. The 212,000 object library ensures you’ll never run out of targets to see or image. The Go2Nova® Hand Controller is intuitive to use and its large 4-line LCD screen simplifies the process of setting telescopes and locating objects.
The CEM26B mount has an AccuAlignTM optical polar scope installed for quick and easy polar alignment. It comes with a 1.5" heavy duty stainless steel tripod.

Shipping Box #1: G281B-GEM28 Head w/ AccuAlign/Tray (G281B)
Shipping Box #2: 8281-CEM26/GEM28 1.5" Tripod w/o Tray (C26/G28 1.5T)        
    
Features

• German equatorial design, latitude range of 10° ~ 70°
• Ideal for both visual observation and astrophotography
• Low periodic error (< ± 12 arc seconds)
• Payload of 12.7 kg (28 lbs) with the mount-only weight of 4.5 kg (10 lbs)
• CNC machined and cast metal body
• Spring loaded gear system
• Large easy to use quick-lock gear clutches
• Stepper motor with low power consumption
• AccuAlignTM calibrated polar scope
• Polar alignment routine for those who can’t see the Pole Star
• Go2Nova® 8409 controller with Advanced GOTONOVA® GOTO Technology
• Integrated ST-4 autoguiding port
• Built-in Wi-Fi
• USB port for firmware upgrade and computer control
• Standard 1.5 inch heavy-duty stainless steel tripod (5kg)
• Die-cast metal tripod spreader with accessory tray
• Optional hard carrying case
• Optional 32-channel Global Positioning System (GPS)
• Optional iGuiderTM autoguiding system (#3360)

TELESCOPE SPECIFICATION

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	AccuAlignTM 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

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

Instructions for use in ENGLISH

Quick Start Guide

Instruction Manual

iPolar Operation Manual

Download Latest Firmware

iPolar Software

Suggested Accessories

CEM26 / HEM27 / GEM28 / HAE29 MiniPier
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iGuider Auto Guide Scope
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