iOptron CEM120 EC2 Center Balanced EQ Mount With Dual High Precision Encoders

Name: iOptron CEM120 EC2 Center Balanced EQ Mount With Dual High Precision Encoders
Brand: iOptron

iOptron

iOptron CEM120 EC2 Center Balanced EQ Mount With Dual High Precision Encoders is a GoTo equatorial mount for heavier or observatory-class deep-sky rigs.

mount flagship

Best Current Offer

Cloud Break Optics

In stock

$5,799.00

Other retailers

Astronomics (In stock)
$9,569.00
Mile High Astronomy (Out of stock)
$8,698.00

Specifications

Mount

Mount type: Center-balanced GoTo equatorial mount
Drive system: 240 sec
Payload capacity: 115 lb (52 kg)
Mount weight: 57 lb (25.8 kg)
Counterweight: Φ38.1x 540 mm (SS, anti-slip, 4.5 kg)
Latitude range: 0°~ 68° (0.5 arcmin division)**

Capacity

Payload-to-weight ratio: 2:1

Motion

Slew rate: Up to 4°/sec
Tracking accuracy: < 0.15 arcsec RMS
Periodic error: < 0.15 arcsec RMS
Encoder: High-precision encoders on both axes

Electronics

Controller: Go2Nova GoTo control with Wi-Fi variant support
Power: 12V DC, 5A (0.7A tracking, 1.8A slewing)

Mechanical

Tripod / pier: Optional pier

Astrophotography Fit

A heavy-payload mount that should be chosen by realistic imaging payload, not headline capacity alone.

iOptron CEM120 EC2 Center Balanced EQ Mount With Dual High Precision Encoders is a flagship GoTo equatorial mount for computerized tracking and guiding.

For long-exposure astrophotography, use a conservative imaging payload. The telescope, camera, guide hardware, dew heaters, dovetails, and cables all count, and guiding performance matters more than the catalog payload number.

Best paired with

Autoguided refractors or corrected reflectors within conservative payload limits
Stable tripod or pier and balanced counterweights
Computer or hand-controller workflow with good polar alignment

Not recommended for

Payloads at the rated maximum for imaging
Users who need an airline-portable rig above all else
Long focal length work without guiding and careful balance

Where To Buy

Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.

Retailer	Price	Availability	View Offer
Cloud Break Optics Cloud Break Optics	$5,799.00	In stock Updated 11/4/2026	View Offer - $5,799.00
Astronomics Astronomics	$9,569.00	In stock Updated 11/4/2026	View Offer - $9,569.00
Mile High Astronomy Mile High Astronomy	$8,698.00	Out of stock Updated 11/4/2026	View Offer - $8,698.00

Price History

Chronological retailer pricing with out-of-stock points shown at reduced opacity.

Astronomics Cloud Break Optics Mile High Astronomy