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Home > Mounts & Tripods > Equatorial Mounts > iOptron CEM60 "Standard" GOTO Centre Balanced Equatorial Mount

iOptron CEM60 "Standard" GOTO Centre Balanced Equatorial Mount

iOptron CEM60 "Standard" GOTO Centre Balanced Equatorial Mount
iOptron CEM60 light weight high capacity Centre Balanced Equatorial Mount Standard version CEM60 Periodic Error Test Report iOptron CEM60 dual mounted Altair Planostar Astrograph & Altair Wave Series 130 Triplet APO iOptron CEM60 Dual Losmandy Dovetail Plate Vixen Altair Astro TMS iOptron CEM60 Dual Mounting Refractor Losmandy Vixen Dovetail Bar CEM60-EC PE Periodic Error Test Graph 1.0 arc second Altair Starbase Ultra Stable Field Tripod / Pier for iOptron CEM60 iOptron Polar Scope Dark Field Illuminated Reticule Alignment iOptron CEM60 vs. iEQ45 size weight capacity iOptron CEM60 in case with Periodic Error Test Report iOptron CEM60 Detail iOptron CEM60 Power & USB cabling ports Detail iOptron CEM60 Altitude Adjustment Gear iOptron CEM60 Altitude Adjustment Lever 1 iOptron CEM60 Altitude Adjustment Lever 2 iOptron CEM60 Azimuth Locking Lever 1 iOptron CEM60 Case Open iOptron CEM60 Closeup iOptron CEM60 Dual Saddle Clamp iOptron CEM60 Easy Access Polar Scope iOptron CEM60 Worm Gear Engage Disengage Switch iOptron CEM60 Worm Fine Tuning Knob & Stainless Steel Counterweight Shaft
Price: £2299.00
Incl. VAT 20% ( £383.17 )
Add CEM60 Accessories
Pier or Tripod options
Product code: 7200
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"We've been waiting for a sub 30lb mount with about 60lb maximum 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 "standard" model is routinely autoguided down to a very low periodic error by experienced customers with a rigid optical tube. In fact, many customers have commented this is the best mount they've owned to date, and a significant upgrade to their previous mounts. The more expensive CEM60-EC with it's Realtime Periodic Error Correction or "RPEC", has been shown by customers to be capable of sub arc second periodic error with auto-guiding and a good quality rigid optical tube. Until now mounts offering this level of performance have cost a lot more. Stay tuned as more images appear from satisfied customers. This is truly a revolutionary product, and has changed the market and customer's expectations at this price-point. "  - Altair Astro Staff

Below are two images taken in London in 2014 with the RC250-TT and iOptron CEM60 mount by customer Jaspal Chadha. The left image is taken using narrowband filters (Ha 5x1200sec, SII 1x1800sec, OII 2x1200sec) and the right-hand image is taken using RGB filters (Red 3x600sec, Green 3x600sec, Blue 1x600sec, Ha 4x600sec) :

(Click to enlarge, opens new window)

Jaspal Chaddr London Image Bubble Nebula Altair RC250-TT narrowband    Jaspal Chaddr London Image Bubble Nebula Altair RC250-TT narrowband

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 maximum 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.

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:


Center-balanced Equatorial Mount (CEM)

Maximum Payload

60 lb (27.2kg), exclude counterweight

Mount weight

27 lb (12.3kg)

Max Payload/Mount weight



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


PPEC (CEM60 Standard) or Real time PEC (CEM60-EC Advanced)

Counterweight shaft

Φ28x 450 mm Stainless steel


20 lb (9.1 kg)

Mount base size

Φ150 mm

Motor drive

Stepper motor


0.06 arc seconds

Slew speed


Power consumption

0.6A (Tracking), 1.1A (GOTO)

Power requirement

12V DC 2A

AC adapter

The US power adapter is not INCLUDED, instead 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. 
,000+ objects database with star recognition

Meridian treatment

Stop (0-15º pass), auto flip, continue


Internal 32-channel GPS

Autoguide port


Communication port

Serial Port

PC computer control


Cable management

4X USB, 2X DC12V (MAX 5A), 6P6C

Operation temperature

-20ºC ~ +45ºC


Optional 2-inch stainless steel tripod (8kg) or Pier (10kg)


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:
Click to join iOptron Imaging Group



To find out about other user's experiences with the CEM60 and other iOptron mounts, we suggest joining the existing iOptron Mount Yahoo User Group: Click here to join the iOptron Imaging Mount User Group (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: 

Availability: June 2014. If you'd like to register your interest in this product, please click  the red "Notify when in stock" button above and enter your email address in the fields. You'll receive an automatic email update when in stock is available to order. Pricing and technical specifications may change without notice, and by registering your interest you are not making a purchase, nor are we offering to sell you this product - it is merely a notification service.

Availability: If product shows as out of stock, please click on the "Notify me when in stock" button to receive instant notification of availability. Altair Astro and iOptron reserve the right to change the product price and specification without notice. 
Warranty note: We have recently become aware of UK companies and inviduals purporting to offer "hypertune" modifications, servicing and repair for iOptron products. There is no company in the UK authorised to repair iOptron products other than Altair Astro (official iOptron agents). We have had mounts back in for servicing after they have been modified with incorrect parts, lubrication, and internal adjustments. We will do our best to help reverse these changes at a reasonable price to get you going again. Any work which is not performed by Altair Astro will invalidate your warranty. If you require servicing or spares from Altair Astro, please contact us, or ask your official dealer to contact us on your behalf.

Related products

Additional 9.5 kg counterweight for iEQ45 CEM60 mount

Customer feedback

Customer Reviews

    I have tested and owned a few mounts in the past.. My most recent was a Skywatcher EQ8 which had faults which couldn't be resolved to my satisfaction, so I decided to replace it with the CEM60. I was quite nervous as it's not really known in the UK. Once arrived and setup correctly I had a few technical queries and emailed the support team. Within four hours on a Sunday I got a detailed response. The support team are outstanding... very outstanding...

    The Mount so far is exceptional.. The tracking graph displayed flat even in poor windy viewing conditions.. The polar alignment is very very very easy just look the the picture on the handset and match though the never unobstructed polar scope...

    I decided to do a drift alignment.. I there for over 10 minutes and didn't even have to adjust anything the polar alignment is spot on

    I would definitely recommend this mount without any doubt

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