iOptron CEM70 Center Balanced Equatorial GoTo Mount with iGuider
iOptron CEM70 Center Balanced Equatorial GoTo Mount with iGuideriOptron CEM70 Center Balanced Equatorial GoTo Mount with iGuideriOptron CEM70 Center Balanced Equatorial GoTo Mount with iGuideriOptron CEM70 Center Balanced Equatorial GoTo Mount with iGuider

iOptron CEM70 Center Balanced Equatorial GoTo Mount with iGuider

  (1 Review)
✓ 2 year warranty


1x in stock shipped 1-2 working days

About this product

Model:  iop_cem70_C70AG
Part Number:  C70AG

Building on the success of the iOptron CEM60 centre balance equatorial mount, iOptron have introduced the new CEM70.

This model features iOptron's integrated 'iGuider' guiding scope and camera. 

Retaining the inherent properties of the centre balance design, this relatively compact mount provides an impressive 70 lbs (31.8 kg) payload capacity, precise GOTO pointing and accurate tracking (PE <±3.5 arc-sec) so will appeal to both both visual astronomers and astrophotographers. 

An impressive features list includes an internal iPolar electronic polar scope, easy lock drive gear engagement (levers large enough to use with gloves) and an integrated 'iGuider' guiding scope and camera. 

It also features an advanced cable management system for the mount, iPolar, guider, and camera. 

Note: The tripod/pier shown in photos not included but is available separately. 


  • A new design, center-balanced equatorial mount (CEM) for maximum payload with natural stability
  • Ideal for both visual observation and astrophotography
  • Payload of 31.8kg / 70lb  with the mount weight of 13.6kg / 30lbs
  • Easy to use and reliable gear clutches
  • Precision altitude and azimuth adjustment.
  • Precision stepper motor with 0.07 arcsec accuracy for precise GOTO and accurate tracking
  • iPolar electronic polar scope
  • Go2Nova® 8407+ V2 controller with Advanced GOTONOVA® GOTO Technology with built in heater
  • High precision tracking with low periodic error (PE)<±3.5 arcsec
  • Permanent periodic error correction (PPEC)
  • Onboard iGuider autoguiding system
  • 32-channel Global Positioning System (GPS)
  • Built-in WiFi for remote operation
  • USB3.0 connection
  • Integrated ST-4 autoguiding port
  • Advanced cable management system with more choices
  • Spring loaded 8" Vixen/Losmandy dual saddle
  • Hard case

Go2Nova Hand Controller 8407

  • 200,000+ object database
  • 8 line, 21 character back lit large screen LCD
  • Low temperature operation as low as -20ºC
  • User friendly interface
  • 9 speed slew control with quiet mode
  • Large object database
  • Serial port for firmware upgrade


What's in the box

  • Mount head – with iPolar electronic Polar Scope & onboard iGuider guiding scope
  • Hand Controller (HC) – Go2Nova® 8407+
  • Counterweight – 21 lbs (9.5 kg)
  • Stainless steel counterweight shaft
  • Built-in GPS module
  • Hand controller coiled cables
  • USB cable
  • AC adapter – 100-240V (DC output 12V/5A)
  • Hard case
  • Quick Start Guide
  • Tripod NOT included 


Mount Center-balanced Equatorial Mount (CEM)
Payload 31.8kg (70lbs), exclude counterweight*
Mount weight 13.6kg (30lbs)
Payload/Mount weight ratio 2.33
Material All metal
Latitude adjustment range 0°~ 65°
Azimuth adjustment range ± 4°
PE (by encoder) < ±3.5 arcsec**
Worm period 348 sec
Right Ascension worm wheel Φ151mm, 248 teeth
Declination worm wheel Φ151mm, 248 teeth
Worm Φ21.2mm
Right Ascension axle Φ55mm, steel
Declination axle Φ55mm, steel
Right Ascension bearings Φ80mm
Declination bearings Φ80mm
Counterweight shaft Φ28x 415 mm (SS, 1.9kg)
Counterweight 9.5 kg (20 lbs) x1
Mount base size Φ152mm
Motor drive Precision stepper motor w/128 micro-step
Resolution 0.07 arc seconds
Slew speed 3.75°/sec (900x) max.
Hand Controller Go2Nova® 8407+, 8 line 21 character LCD
Power requirement DC 12V, 5A (5.5mm/2.5mm plug)
Power consumption 0.6A(Tracking),0.8A(GOTO)
Polar Scope Internal electronic polar scope, iPolar
Meridian treatment Stop (0-10° pass), auto flip
Zero position Automatic zero search
Park position Horizontal, vertical, current, alt/azi input
Level indicator YES
Dovetail saddle 8" Losmandy D & Vixen
Guiding port ST-4
Communication port USB3.0, Wifi
Cable management 2xDC12V (3A), 3xUSB3.0, 1xDC in/2xDC out, iPort.
1X USB input for mount, iGuider, iPolar and more
Guiding scope/camera Built in guiding scope and camera, iGuider
Operation temperature range -20°C ~ +45°C
Hard case YES
Pier/Tripod Optional LiteRoc tripod or pier
Warranty Two year limited


* iOptron's quoted max' payload is a guide only. If you will be using the mount for astrophotography (or your telescope is unusually long or large) we recommend the quoted max' payload be reduced by 1/3rd. 

Downloads / Manuals


Quick Start Guide 
Instruction Manual 
iPolar Operation Manual 
iGuider Operation Manual 


Download Latest Firmware 
iPolar Software 
FTDI VCP Driver, or go to FTDI Chip website to download the VCP driver

iOptron Telescope ASCOM Driver:

Install ASCOM Driver and Commander 

Customer reviews

Average Rating (1 Review):  
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Rating (max 5):  
Very impressive
Monday, 27 July 2020  | 

Ok, so this is my first product review for a major item. First of, this was heavier than I anticipated, but then again Iíve been used to a Sw star adv on a typical tripod using a Wo ZS71ed. It is still very much portable for star parties or seeking out dark skies. This is my very first own goto mount, I have once borrowed a Celestron AVX and because of this, led me to purchasing the CEM70g. The quality of the build, the precision of the engineering is fantastic. It has a great sturdy feel about it and set up onto the tri-pier was simple enough. Initial set up of the mount is very straight forward, just switch it on, the gps does its thing almost instantaneously and before you know it youíre good to go. I had to adjust the time but that was it. So Iím just trying to link the WiFi of the mount to SS6 pro on macOS but am having some issues regarding the mount due to not being on the SS6 mount list, it needs to have the ip address and port put in manually. I have had immediate success using the Usb3 port with a usb to thunderbolt adaptor and choosing the Cem120 option. This allowed control of the mount via SS6. As Iíve gone at the deep end with a mount that has iPolar & an iGuider, Iím slowly getting round to trying these features out and will review this again soon. Iím looking forward to setting up the scope with my ASI 183 c Pro using the usb3 and power ports for the cable management. I will review again with pics hopefully but in general, I feel this is a great mount that will serve me well for years to come. If the cem60 is anything to go by, this should be a very good replacement/upgrade. Thank you Flo for your advice as always & your support to date for helping with the purchase of my first goto mount.


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