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CEM70 Equatorial Mount for Telescope


The CEM70 and revolutionary CEM70G are new standard bearers for equatorial mounts in the 70lb payload segment.

(NOTE: Tripod/Pier not included. See bundle offer with LiteRoc tripod for the CEM70 and CEM70G)

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SKU: ASC1329 Categories: ,
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The CEM70 and revolutionary CEM70G are iOptron‘s standard bearers for equatorial mounts in the 70lb payload segment.

Retaining the inherent properties of the center balance design, the CEM70 and CEM70G are relatively compact medium payload mounts that deliver what astronomers expect in an efficient accurate portable mount. With precise GOTO pointing and accurate tracking (PE <±3.5 arcsec) the CEM70 is a solid performer for observers and imagers alike.

Innovative operational features such as the internal iPolar electronic polar scope, easy lock drive gear engagement (levers large enough to use with gloves), an advanced cable management system for the mount, iPolar, guider, and camera, and cumulatively assure users the CEM70 and CEM70G designed with their needs in mind. The CEM70 Equatorial mount for telescope offers outstanding load carrying capacity, WiFi connectivity, a built in USB hub as well as dual size dovetail that will fit both Losmandy and Vixen style dovetails. This mount can easily handle a telescope as large as an 11″ Schmidt Cassegrain complete with all accessories and cameras without any issues. If you want an Equatorial mount for telescope with room to grow and multiple connectivity options as well as good tracking performance, this could be the best option available.

Some advice on choosing instruments can be found here

(NOTE: Tripod/Pier not included. See bundle offer with LiteRoc tripod for the CEM70 and CEM70G)

CEM70 Equatorial mount for telescope
The CEM70 Equatorial mount for telescope offers large load capacity at an attractive price with outstanding feature set and performance.

Technical Features of both the CEM70 and CEM70G equatorial mount for telescope:

  • Mount Type:     CEM (Center balanced equatorial Mount).
  • Payload (excl. CW):     31.8 kg?70 lbs).
  • Mount Weight:     13.6 kg (30 lbs).
  • Payload/Mount Weight:     2.33.
  • Latitude Adjustment Range:     0?65°.
  • Azimuth Adjustment Range:     ±4°.
  • Tracking Accuracy (PE):     < ±3.5 arcsec.
  • Period:     348 sec.
  • Right Ascension Worm Wheel:     248 teeth, M=0.6, Ø151 mm.
  • Declination Worm Wheel:     248 teeth, M=0.6, Ø151 mm.
  • Worm:     Ø21.2 mm.
  • Right Ascension Axle:     Ø55 mm steel.
  • Declination Axle:     Ø55 mm.
  • Right Ascension Bearings:     Ø80 mm.
  • Declination Bearings:     Ø80 mm,
  • Counterweight Shaft:     Ø28 x 415 mm (SS, 1.9 kg).
  • Counterweight:     9.5 kg x 1.
  • Mounting Base Diameter:    Ø152 mm.
  • Motor:     1.8° stepper motor w/128 micor-step.
  • Resolution:     0.07 arcsec.
  • Transmission:    Synchronous belt.
  • Hand Controller:     Go2Nova 8407+;  8 line 21 character LCD.
  • Power:     DC 12V, 5A.
  • Power Consumption:     0.6A (tracking), 0.8A (GOTO).
  • Polar Scope:     Internal electronic polar scope, iPolar.
  • Meridian treatment:     Stop (0-10° pass), flip.
  • Zero position:     Automatic zero search.
  • Park position:     horizontal, vertical, current, alt/az input.
  • Dovetail saddle:     8-inch L-style D, and V-style.
  • Level Indicator:     YES.
  • Slew speed:     3.75°/sec (900x) max.
  • PEC:     Permanent PEC.
  • Guiding Port:     ST-4.
  • GPS:     YES.
  • Operation temperature range:     -20°C ~ +45°C.
  • Hard case:     YES.
Weight13.5 kg
Dimensions52 × 45 × 25 cm


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Mount Type

Payload (excl. CW)

Mount Weight

Payload/Mount Weight

Latitude Adjustment Range

Azimuth Adjustment Range

Tracking Accuracy (PE)


Ascension Worm Wheel

Declination Worm Wheel


Right Ascension Axle

Declination Axle

Right Ascension Bearings

Declination Bearings

Counterweight Shaft


Mounting Base Diameter




Hand Controller


Power Consumption

Polar Scope

Meridian treatment

Zero position

Park position

Dovetail saddle

Level Indicator

Slew speed


Guiding Port

communication Port

Cable Management

Guiding scope/camera

Operation temperature range



CEM (Center balanced EQ Mount)

31.8 kg(70 lbs)

13.6 kg (30 lbs)




< ±3.5 arcsec

348 sec

248 teeth M=0.6 Ø151 mm

248 teeth M=0.6 Ø151 mm

Ø21.2 mm

Ø55 mm steel

Ø55 mm steel



Ø28 x 415 mm (SS, 1.9kg)

9.5 kg x 1


1.8° stepper motor w/128 micor-step

0.07 arcsec

Synchronous belt

Go2Nova 8407+; 8 line 21 character LCD

DC 12V, 5A

0.6A (tracking), 0.8A (GOTO)

Internal eletronic polar scope, iPolar

Stop (0-10° pass), flip

Automatic zero search

horizontal, vertical, current, alt/azi input

8″ Losmandy D & Vixen


3.75°/sec (900x) max.

Permanent PEC



2xDC12V (3A), 3xUSB2.0, 1xDC in/1xDC out, iPort.
1X USB input for mount, iPolar and accessories
Guiding scope/camera Built in guiding scope and camera, iGuider No
Operation temperature range -20°C ~ +45°C -20°C ~ +45°C

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