Description Technical Specs Support Documents Innovative ideas applied to a time tested design, the iOptron® GEM45EC next generation German equatorial mounts. A sharp looking CNC body is the first indicator the GEM45 is a top quality mount in both form and function.



Utilizing experiences gained during development of our CEM series, we were able to remove unnecessary bulk giving the GEM45 an incredible 2.8 payload to mount weight ratio. This compact 15.8lb mount can precisely GOTO an object and track with up to 45lbs of gear onboard. With its integrated electronic polar scope (iPolarTM), polar alignment is a snap, even when the pole star is obscured. Large levers on the quick-lock drive engagement system make it easy to snap its drive gears into place even when wearing gloves. There is little chance of your cables getting snagged with the GEM45's internal advanced cable management system. A new, patent pending Universal Self-Centering Saddle (USCS) accommodates Losmandy and Vixen style dovetail plates. GEM45EC mounts utilize reliable stepper motor drive systems with our low power consumption technology. Looking for ultra precise tracking, the GEM45EC with its high resolution encode delivers a PE<0.25 arcsec rms. Our new LiteRoc 1.75" tripod delivers rock solid stability in a lighter, more compact package. A 212,000+ object library with star identification, GPS, Wi-Fi (requires optional iStarFi adapter) are a few of the desirable features standard on a GEM45 mount. Mount German Equatorial Mount Max payload* 45 lbs (20 kg), exclude counterweight Mount weight 15.8 lb (7.2 kg) Payload/Mount weight 2.78 Structure Material All metal, CNC machined Exterior Finish Anodized red/black Latitude adjustment range 14º ~ 68º Azimuth adjustment range ± 6º Tracking accuracy (PE)** <0.25 arcsec rms PEC Real-time PEC (RPEC) Period 400 sec Worm diameter Φ17mm, Brass Right Ascension worm wheel Φ110mm, 216 teeth, zero backlash Declination worm wheel Φ110mm, 216 teeth, zero backlash Right Ascension axis shaft Φ45mm steel Declination axis shaft Φ45mm steel Right Ascension bearings Φ68mm Declination bearings Φ68mm Counterweight shaft Φ28X280 mm, Stainless Steel (1.2 kg) Counterweight 11lbs (5kg) X1 Motor Precision stepper motor, 1.8º/128X micro-step Motor resolution 0.08 arcsec (200 PPS) Transmission Synchronous belt Hand Controller Go2Nova® 8407+, 8 line 21 character LCD Star Database 212,000+, star identification Power DC 12V, 5A AC adapter 100V ~ 240V (included) Power consumption 0.6A(Tracking), 0.9A(GOTO) Power-down memory Yes Polar scope Internal iPolar TM electronic polar scope Meridian treatment Stop (0-20° pass), flip Zero position Automatic zero search Dovetail saddle iOptron Universal Saddle, 5" Max slew speed 4.5°/sec (1080X) Guiding port ST-4 Communication port USB GPS Yes WiFi External (optional) Cable Management DC12V (3A), ST4,USB Tripod 1.75" Stainless Steel(~8kg), or optional Tri-pier Hard case Included Operation temperature -10ºC ~ 40ºC Warranty Two year limited

* OTA size and length dependent

** Measured with encoder on the bench, 400 seconds * OTA size and length dependent** Measured with encoder on the bench, 400 seconds Manual:

Quick Start Guide

Instruction Manual

iPolar Operation Manual



Firmware and Software:

GEM45 Firmware

iPolar Software





iOptron Telescope ASCOM Driver:

Install ASCOM Driver and Commander



FTDI VCP Driver , or go to FTDI Chip website to download the VCP driver Features

German equatorial mount with innovative features

Idea for both visual observation and astrophotography

Maximum payload of 45 lbs (20 kg) with the mount weight of only 15.8 lbs (7.2 kg)

Easy to use quick-lock gear clutches

Integrated iPolar TM electronic polar finder

electronic polar finder Low periodic error (<0.25 arc seconds rms)

Realtime periodic error correction (RPEC)

Precision stepper motor for precise GOTO and accurate tracking

Go2Nova® 8407+ controller with Advanced GOTONOVA® GOTO Technology and built-in heater

Integrated ST-4 autoguiding port

32-channel Global Positioning System (GPS)

USB communication port

Cable management system

New, patent-pending iOptron universal saddle

All metal, CNC machined with red/black anodized

Optional WiFi for mount control via SmartPhone/Tablet/Computer

All new LiteRoc 1.75" tripod with improved stability and leg locks

Hard case included

NEW iOptron subsidized TheSky Imaging Edition



Shipping Contents iOptron® GEM45EC mount (#7620ECA, high precision model with red gear switches)

Go2Nova® 8407 Hand Controller

One 11lbs (5 kg) counterweight

Stainless steel counterweight shaft

Internal iPolar electronic polar scope

GEM45 GPS module

AC adapter (100V-240V)

2X coiled control Cable (6P6C RJ11 to RJ11, straight wired)

Serial cable (RS232 to RJ9)

USB cable

LiteRoc 1.75" tripod with improved stability and leg locks

Aluminum carrying case

Quick Start Guide