iOptron GEM45 GEQ GoTo Mount with iGuider, LiteRoc Tripod & Case
 iOptron GEM45 GEQ GoTo Mount with iGuider, LiteRoc Tripod & CaseiOptron GEM45 GEQ GoTo Mount with iGuider, LiteRoc Tripod & Case 

About this product

Model:  iop_gem45ag
Part Number:  7603AG

New GEM45 with built-in iGuider and iPolar!

The latest addition to GEM45 family is a GEM45 with an on board guiding camera, iGuider. The iGuider consists of a 30mm f4 lens with a 1/3 inch, 3.75um pixel imaging sensor conveniently imbedded in the mount dovetail saddle. The iPolar, iGuider and an extra USB port on the dovetail saddle are all connected through one USB connection.

Using experience gained during the development of their CEM series, iOptron have removed unnecessary weight resulting in a portable 7.2 kg / 15.8 lb mount with an impressive 2.8 payload-to-mount weight ratio. 

With its integrated electronic polar scope (iPolar) polar alignment is a breeze, even when the pole star is obscured.

IOptron's reliable ultra-quiet stepper motors provide precise pointing and tracking together with low power consumption. Large levers make it easy to engage the drive gears into place, even when wearing gloves. 

Integrated internal cable management means there is little chance of your cables becoming snagged and a dual saddle accommodates both Losmandy and Vixen style dovetail plates. 

A new 'LiteRoc' 1.75" tripod delivers high stability in a lighter, more compact package.

Other features include computerised GOTO with a 212,000+ object library (includes star identification) GPS and Wi-Fi (requires optional StarFi adapter).


  • Next generation German Equatorial Mount
  • Suitable for both visual observation and astrophotography
  • Maximum payload of 45 lbs (20 kg) with a mount weight of only 17.5 lbs (7.9 kg)
  • Easy to use quick-lock gear clutches
  • Integrated iPolar electronic polar finder
  • Low periodic error (< ± 7 arc seconds)
  • Permanent periodic error correction (PPEC)
  • Ultra-quiet precision stepper motors for precise GOTO and accurate tracking
  • Go2Nova® 8407+ controller with Advanced GOTONOVA® GOTO Technology and built-in heater
  • Onboard iGuider autoguiding system
  • Integrated ST-4 autoguiding port
  • 32-channel Global Positioning System (GPS)
  • USB communication port
  • Integrated cable management system
  • New, patent-pending iOptron universal saddle
  • All metal, CNC machined body with red/black anodised surfaces
  • Optional WiFi for mount control via SmartPhone/Tablet/Computer
  • All new LiteRoc 1.75" tripod with improved stability and leg locks

Go2Nova Hand Controller 8407

  • 200,000+ object database
  • 8 line, 21 character back lit large screen LCD
  • Low temperature operation as low as -20ºC
  • User friendly interface
  • 9 speed slew control with quiet mode
  • Large object database
  • Serial port for firmware upgrade

What's in the box

  • iOptron® GEM45 mount (#7620A, with black gear switches)
  • Hard Case
  • Go2Nova® 8407 Hand Controller
  • One  5kg / 11lbs 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
  • Quick Start Guide


Mount German Equatorial Mount
Max payload* 45 lbs (20 kg), exclude counterweight
Mount weight 17.5 lb (7.9 kg)
Payload/Mount weight 2.53
Structure Material All metal, CNC machined
Exterior Finish Anodized red/black
Latitude adjustment range 14º ~ 68º
Azimuth adjustment range ± 6º
Tracking accuracy (PE)** <±7 arcsec
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 (5.5mm/2.5mm plug)
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 8" Losmandy D & Vixe dual saddle
Max slew speed 4.5°/sec (1080X)
Guiding scope/camera Built in guiding scope and camera, iGuiderTM
Guiding port ST-4
Communication port USB
WiFi External (optional)
Cable Management DC12V (3A), ST4,USB
Tripod 1.75" Stainless Steel(~8kg), or optional Tri-pier
Hard case Optional
Operation temperature -10ºC ~ 40ºC
Warranty Two year limited


* OTA size and length dependent
** Measured with encoder, 400 seconds

Downloads / Manuals


Quick Start Guide
Instruction Manual
iPolar Operation Manual
iGuider Operation Manual


GEM45 Firmware
iPolar Software
FTDI VCP Driver, or go to FTDI Chip website to download the VCP driver

iOptron Telescope ASCOM Driver:

Install ASCOM Driver and Commander
iGuider ASCOM Driver

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