iOptron CEM40EC Computerized Equatorial Mount with iPolar, Hard Case, and Encoders

  • Mount weight: 15.8 lbs
  • Maximum payload: 40 lbs
  • Integrated iPolar polar scope
  • Tracking accuracy: 7 arcsec
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  • Regular price $2,998.00

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iOptron CEM40EC Computerized Equatorial Mount with iPolar, Hard Case, and Encoders

Please note: This iOptron CEM40EC includes an integrated iPolar (polar alignment scope), a 2-inch tripod, and a custom hard case to fit both.

The iOptron CEM40EC computerized mount is an impressive and notable addition to the center-balanced equatorial mounts on the astronomy market today. Coupled with a sleek design and a payload capacity more than doubling its own weight, this full metal mount isn't something to pass up. Whether you're an avid astrophotographer or a dedicated visual observer, this mount will perfectly suit your needs.

Already integrated into this mount on arrival is the electronic polar finder scope, the iPolar, and high-precision encoders for incredible tracking. With this, you're sure to have accurate and easy polar alignment whenever you're ready to get out under the stars--even if the pole star is obscured! This is just one of many incredible features of the iOptron CEM40EC Mount.

iOptron CEM40EC Main Features:

  • Heavy Load Capacity - Weighing only 15.6 lbs itself, this mount can easily support up to 40 lbs with no issues
  • Integrated iPolar Polar Finder - Integrated polar scope allows for easy polar alignment with no external equipment required to purchase
  • Low Periodic Error - Coming in with fantastic 7-arcsecond accuracy and built-in permanent periodic error correction, your tracking will be essentially perfect in no time
  • Go2Nova 8407+ Controller - Intuitive system controller with Advanced GOTONOVA GOTO Technology to ensure comprehensive control
  • Multi-Port Compatibility with GPS - Utilize the 32-channel GPS integrated into the mount with various ports for ST-4 autoguiding and other accessories
  • Tripod and Hard Case - Enjoy a 1.5-inch heavy-duty, stainless steel tripod and Hard Case included with this system to ensure your setup is both sturdy and protected
  • WiFi Capabilities - This whole system can be controlled via a smartphone, tablet, or computer 
  • High-Precision Encoders - Advanced encoders built into this computerized mount drastically improve your tracking accuracy 

Innovative iOptron Technology

The CEM40EC mount uses iOptron's patent-pending Universal Self-Centering Saddle (USCS). This saddle accommodates both Losmandy and Vixen-style dovetail plates. This mount also uses iOptron's ultra-quiet, low-power consumption stepper-motor drive-system, aiding the mount in providing precise tracking.

iOptron CEM40 Mount Close Lens

The iOptron CEM40EC mount uses the Go2Nova 8407 hand controller to navigate the night sky. This technology helps observers find celestial objects with the aid of the mount's 212,000+ object database. For those looking for a telescope that has the capability of tracking and finding night sky objects, this mount is a must-have tool.

With the included tripod, 10-pound counterweight, and the mount's computerized technology, observers are just an OTA away from a spectacular viewing experience!

What's in the Box

  • iOptron CEM40EC with integrated iPolar
  • Counterweight Shaft
  • 10 lb Counterweight
  • Hard Carrying Case
  • 1.5-Inch Stainless Steel Tripod
  • Go2Nova 8407 Hand Controller



Database359000 Objects
DEC Worm Wheel110mm Diameter 216 Teeth
Drive Typeprecision stepper motor
Free ShippingYes
Latitude Range0 to 60 Degrees
RA Worm Wheel110mm Diameter 216 Teeth
Slew Speed4.5°/sec (1080x)
Tracking Accuracy±0.25 Arcseconds
Tripod Weight15 lbs


  • CEM40EC: Center-balanced equatorial mount head
  • Adjustable Counterweight shaft and 10-pound counterweight
  • Case: Fitted hard case
  • Tripod: 1.5-inch diameter steel legs with spreader-accessory tray
  • Customer Reviews

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    Raymond H.
    United States United States


    I am still evaluating but the mount appears well-made. I especially like the RA and DEC locking mechanism. iPolar is clever and convenient. The iPolar software as posted by the manufacturer seems to trigger Microsoft virus detection software, requiring that I disable some virus protection features on my computer. The Cable management system is a nice try but iOptron only provided for one USB cable to come through the CMS. Another one is needed for the guider.