Skip to product information
1 of 1


iOptron CEM40 Goto EQ Mount

iOptron CEM40 Goto EQ Mount

Regular price $4,599.00
Regular price Sale price $4,599.00
Sale Sold out
Tax included. Shipping calculated at checkout.

A center-balanced equatorial mount with electronic polar scope. Lightweight and whisper quiet


The iOptron® CEM40 mount is the next generation of center-balanced equatorial mounts. This mount is incredibly eye-pleasing, and its beauty is found in more than its appearance. The functionality of the mount is superb. Weighing in at only 7.2kg., this mount can support a payload of up to 18kg. That's incredible!

This mount also has an integrated electronic polar finder scope known as the iPolar. This tool ensures the accurate alignment of a telescope, even in the soouthern hemisphere with no bright pole star. There are large levers on the quick-lock drive engagement system; these large levers make it easy to snap the gears into place.

Innovative iOptron Technology
Make way for an innovative mount! This iOptron CEM40 mount uses iOptron's patent-pending Universal Self-Centering Saddle (USCS). This saddle accommodates Losmandy and Vixen-style dovetail plates. The CEM40 also uses iOptron's ultra-quiet, low-power consumption stepper motor drive system, aiding the mount in providing precise tracking.

Computerized Mount Features
The iOptron CEM40 mount uses the Go2Nova® 8407 hand controller to navigate the night sky. This incredible technology helps observers find celestial objects with the aid of the mount's 359,000+ object database! For those looking for a telescope that has the capability of tracking and finding beautiful night sky objects, this mount is a must have tool.

With the included tripod, 5kg. counterweight, and the mount's computerized technology, observers are just an OTA away from a spectacular viewing experience!

What's in the box:

  • CEM40 Equitorial Mount Head
  • Counterweight shaft
  • 5kg Counterweught
  • Go2Nova ® 8047 Hand Controller with cord
  • 1.5" Tripod



Mount   Center-Balanced Equatorial Mount
Max payload*   18 kg excluding counterweight
Mount weight   7.2 kg
Payload/Mount weight   2.5
Structure Material   All metal, CNC machined
Exterior Finish   Anodized red/black
Latitude adjustment range   0º ~ 60º(special CW shaft mounting if <10° )
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, SS 1.2 kg
Counterweight   1 x 5kg included
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   359,000+, star identification
Power   DC 12V, 5A
AC adapter   NZ Compliant Power supplied included
Power consumption   0.6A(Tracking), 0.9A(GOTO)
Power-down memory   Yes
Polar scope   Internal iPolar TM electronic polar scope
Meridian treatment   Stop (0-10° 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   1.5" Stainless Steel(5kg), optional 2" or tri-pier
Hard case   Included
Operation temperature   -10ºC ~ 40ºC
Warranty   Two year limited



  • Unique design, Center-Balanced equatorial mount (CEM) for maximum payload and minimum mount weight
    Idea for both visual observation and astrophotography
  • Maximum payload of 40 lbs (18 kg) with the mount weight of only 7.2kg
  • All metal, CNC machined with red/black anodized
  • Easy to use quick-lock gear clutches
  • Integrated iPolarTM electronic polar finder
  • Low periodic error (< ± 7 arc seconds)
  • Permanent periodic error correction (PPEC)
  • Precision stepper motor for precise GOTO and accurate tracking
  • Go2Nova® 8407+ controller with Advanced GOTONOVA® GOTO Technology with 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
  • Standard 1.5 inch heavy-duty stainless steel tripod (5kg)
  • Optional WiFi for mount control via SmartPhone/Tablet/Computer
View full details