iOptron CEM60-EC "Advanced" Centre Balanced GOTO Equatorial Mount
iOptron CEM60-EC "Advanced" Centre Balanced GOTO Equatorial Mount
iOptron CEM60-EC "Advanced" Centre Balanced GOTO Equatorial Mount
iOptron CEM60-EC "Advanced" Centre Balanced GOTO Equatorial Mount
iOptron CEM60-EC "Advanced" Centre Balanced GOTO Equatorial Mount

iOptron CEM60-EC "Advanced" Centre Balanced GOTO Equatorial Mount

Product code: 7201
£2,585.83 (ex. VAT)
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Product information

Availability: IN STOCK SHIPPING 1-2 DAYS .

The iOptron CEM60, has a maximum payload of 27kg (60 lbs) and a mount-only weight of 12.3 kg (27lbs). Not only does the CEM60 have an amazing weight to payload capacity, it also outperforms similar size mounts costing several times the price in accuracy, with all the advanced imaging-friendly features you could wish for. The recommended imaging weight depends on your optical tube length and shape, focal length and of course the focal ratio and pixel size of your camera. Refractors and telescopes with long optical tubes produce more torque on the mount (increased moment-arm and leverage) therefore it is difficult to give an exact maximum rating for imaging because dampening time may be longer with a lengthy tube than say, with a compact Ritchey Chretien. Always talk to your dealer for advice.

The CEM60 puts the weight of the payload at the center of gravity allowing for greater natural stability. This makes the mount extremely light compared to its payload with a payload-to-weight ratio of 2.2. That's why the CEM60 is a good choice for both portable field setup, AND permanent observatory use.
The CEM60 redefines the concept of the equatorial mount for viewing and astrophotography by placing the load between two precision engineering main bearings. This improves tracking accuracy compared to conventional mounts where the bearings are placed comparatively far away from the load.
Two versions of the CEM60 are available. The CEM60 which is the "Standard" model with Programmable Periodic Error Correction (PPEC) and the CEM60 "Advanced" model with optional Real-Time PEC for incredibly high tracking accuracy, intended for customers with longer focal length instruments, or those who want the very best tracking performance available. Either mount still offers simply amazing performance in it's class.

The iOptron CEM60 mount features a large dual 1.75" / 3" dovetail clamp for convenient use of most telescopes on the market. Other features include an adjustable counterweight bar to prevent obstruction with the tripod or pier. Polar alignment is quick and easy with the AccuAligningTM polar scope, which can be viewed-through regardless of where the mount is pointing, because it isn't blocked by the declination shaft.

The CEM60 is equipped with the most advanced GOTONOVA® GOTO technology, making it one of the most powerful and accurate GOTO mounts available. The CEM database includes over 300,000 objects. The Go2Nova® Hand Controller is intuitive to use and its large 8-line LCD screen simplifies the process of setting telescopes and locating objects. 
Another feature is through-cabling to reduce the number of cables around your telescope and imaging accessories. 2x 12v power-out ports and 4x USB ports are conveniently placed just below the dovetail clamp on the mount's RA axis.

"We've been waiting for a sub 30lb mount with high carrying capacity for some time now. The iOptron CEM60 fits into an ideal position in the market, where the portability vs. carrying capacity ratio allows for either observatory or field use with larger telescopes or dual-mounted refractor/reflector combos. The CEM60 is a pleasure to use, with almost zero backlash evident during autoguiding corrections and slewing. It slews and tracks very smoothly and quietly, so it won't wake up the neighbours. The CEM60-EC with it's Realtime Periodic Error Correction or "RPEC", is capable of approx.1 arc second periodic error with guiding and a good quality rigid optical tube, and we have several reports of  approx. 5 arc seconds without guiding. (We are continually updating this text as more reports from satisfied customers keep coming in). This tracking performance equivalent to mounts costing 4x the price or more."  - Altair Astro Staff

Feature list:
  • A new design, center-balanced equatorial mount (CEM) for maximum payload and minimum mount weight
  • Specialized astrophotography mount ideal for entry-level and intermediate Astro-photographers
  • Patent pending non-contact magnetically loaded gear system
  • Maximum Payload of 60 lbs (27.2 kg) with the mount-only weight of 27 lbs (12.3 kg)
  • Gear switches on both R.A. and DEC axes for easy balancing when disengaged
  • Adjustable counterweight shaft for 0º latitude operation
  • Screw/worm type latitude adjuster for precision adjustments
  • Milling machine tooling vise type latitude bearing and locks system for rock solid positioning
  • User side azimuth fine adjusters for easy azimuth adjustment
  • Precision stepper motor with 0.06 arcsec accuracy for precise GOTO and accurate tracking
  • iOptron AccuAligningTM calibrated polar scope with dark-field illumination and easy polar alignment procedure, allowing for fast and accurate polar alignment
  • Polar alignment routine for those who can't see the Pole Star
  • Go2Nova® 8407 controller with Advanced GOTONOVA® GOTO Technology with built in heater
  • Permanent periodic error correction (PPEC) or Realtime periodic error correction (RPEC)
  • Integrated ST-4 autoguiding port
  • Built-in 32-channel Global Positioning System (GPS)
  • Built-in or customized cable management system
  • Spring loaded Vixen/Losmandy dual saddle
  • 150mm base size to match optional 2 inch heavy-duty stainless steel tripod (8kg) or 42/48 inch pier
  • Optional PowerWeightTM rechargeable battery pack
Technical Specifications:
Mount Center-balanced Equatorial Mount (CEM)
Maximum Payload 60 lb (27.2kg), exclude counterweight
Mount weight 27 lb (12.3kg)
Max Payload/Mount weight 2.22
Material All metal (except GPS cover)
Latitude adjustment range 0º ~ 70º
Azimuth adjustment range ± 8º
Right Ascension worm wheel Φ146mm, 288 tooth aluminum
Declination worm wheel Φ146mm, 288 teeth aluminum
PEC PPEC (CEM60 Standard) or Real time PEC (CEM60-EC Advanced)
Counterweight shaft Φ28x 450 mm Stainless steel
Counterweight 20 lb (9.1 kg)
Mount base size Φ150 mm
Motor drive Stepper motor
Resolution 0.06 arc seconds
Slew speed 1×,2×,8×,16×,64×,128×,256×,512×,MAX(~3.75º/sec)
Power consumption 0.6A (Tracking), 1.1A (GOTO)
Power requirement 12V DC 2A
AC Adapter The US power adapter is not INCLUDEDinstead a 12v fuzed car lighter socket is included fo you to connect to your 12v power source.
Polar Scope AccuAligningTM dark field illuminated, 2 arc min
Level indicator Level bubble
Dovetail saddle 8" Losmandy/Vixen dual saddle
Hand Controller GotoNova® 8407.  300,000+ objects database with star recognition
Meridian treatment Stop (0-15º pass), auto flip, continue
GPS Internal 32-channel GPS
Autoguide port ST-4
Communication port Serial Port
PC computer control Yes (ASCOM)
Cable management 4X USB, 2X DC12V (MAX 5A), 6P6C
Operation temperature -20ºC ~ +45ºC
Tripod Optional 2-inch stainless steel tripod (8kg) or Pier (10kg)
Warranty Two year limited

Mounting options summary: 
  • Optional iOptron 2" Stainless Steel tripod (8kg) - recommended for use with a light OTA up to 800mm focal length.
  • Optional iOptron Portable Field Pier (10kg) - recommended for medium weight OTAs up to 1200mm focal length.
  • Altair Starwave Field Pier / Tripod (17.5kg) - the ultimate for image-sharpness with any OTA the mount can support.
  • Optional SkyShed Altair 8" Steel Observatory Pier System (40kg) - as above, for semi-permanent outtdoor installation on a patio or decking, or permanent observatory use.
For the ultimate in stability, consider the ultra-stable Altair Starbase Field Pier / Tripod, which sets a new standard for freedom from flex, strength and stability. For permanent mounting, consider the Altair/SkyShed 8" Steel Observatory Pier, with a unique design, making it the easiest-to-install pier on the market. (See thumbnail images and ordering options). 

Online resources:
iOptron CEM60 Manual, Software & Firmware updates
Download the iOptron CEM60 Mount Intruction Manual here! (PDF format, opens new window)

Here's a video of the CEM60 slewing sound - the beeps can apparently be disabled but the important thing is how quiet this mount is: 

iOptron & Altair Astro reserve the right to change product design, specification and price without notice.

Technical specifications

Brand iOptron
Product Code 7201
Weight 20kg