iOptron iEQ75-GT GoTo German Equatorial Mount

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About iOptron

The iEQ75-GT is a one-of-a-kind premium CNC-machined astro-imaging mount from iOptron. The iEQ75-GT offers the next generation GoTo technology from iOptron plus a tracking error of only 0.3 arc seconds realized by a Renishaw high resolution encoder-enabled double closed-loop tracking, driven by a precision DC servo motor. No other mount comes close to this! The iEQ75-GT has a payload of 75 lbs and includes a calibrated dark field illumination polar scope. Its unique base design makes it easy for just one person to carry to location.

iOptron Features

  • Premium CNC-machined astrophotography mount suited for advanced imaging
  • Heavy-duty German equatorial mount
  • Precision DC servo motor-driven and double closed-loop tracking with Renishaw high resolution encoder feedback
  • ST-4 autoguiding port capable of reverse guiding with auto-protection
  • Built-in 32-channel GPS
  • #8406 controller with Advanced GoToNova GoTo Technology and heating mechanism
  • Calibrated polar scope with dark-field illumination and easy polar alignment procedure - allowing for fast and accurate polar alignment
  • RS232 port for mount firmware upgrade and ASCOM control
  • RS485 new command set completely open for user-defined control of the mount

iOptron Specifications

75 lbs (34kg)
Payload/Mount Weight
Latitude Adjustment Range
Azimuth Adjustment Range
Ascension Worm
Zero-Gap Worm
Dia. 185mm
228 Teeth
Declination Worm
Zero-Gap Worm
Dia. 156mm
192 Teeth
Ascension Axis
Dia. 60mm
Declination Axis
Dia. 45mm
Counterweight Bar
Dia. 31.8mm
8kg x 2
Motor Drive
Precision DC Servo
0.1 Arc Second
Power Requirement
DC 12V 3A
Power Consumption
0.3A(Tracking) 1.2A(GOTO)
Polar Scope
Yes (with Dark-field illumination)
32 Channel GPS
Tracking Control Method
Ascension Axis, Closed Double Loop Motor
Tracking Error (Periodic Error)
<±0.3 Arc Second
52 lbs (23.5kg)
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