SKU: 78985967156

iOptron CEM120EC EQ GoTo Mount with High Precision RA Encoder

Sale price$2925.00 Regular price$3250.00
Save 10%

Pay in installments of $812.50 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 1 - Sep 6

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

iOptron CEM120EC EQ GoTo Mount with High Precision RA EncoderDescription An extraordinary innovation in mount design Recognizing the growing demand for an accurate and stable, equatorial mount with the versatility to carry larger instruments and more complex imaging arrays, iOptron created the CEM120. It offers the benefits of their revolutionary center balance design: stability, accuracy, and smooth mechanical operation, while capable of carrying a payload up to 52kg. The centre balance designs natural

Description

An extraordinary innovation in mount design

Recognizing the growing demand for an accurate and stable, equatorial mount with the versatility to carry larger instruments and more complex imaging arrays, iOptron created the CEM120. It offers the benefits of their revolutionary center balance design: stability, accuracy, and smooth mechanical operation, while capable of carrying a payload up to 52kg.

The centre balance design’s natural stability is due to its focusing the mount along with payloads weight directly over the centre of the pier or tripod.

The CEM120's performance is demonstrated by its low periodic tracking error. Along with the stability aspect, the CEM120 features an advanced cable management system consisting of more ports in more locations preventing tangle ups and reducing the chance of fractured cables. It also adds some new features to the CEM family like Wi-Fi and LAN for remote operation and easy to use, reliable clutches on both axes.

Features

  • Centre-balanced equatorial mount (CEM) for maximum payload with natural stability
  • Payload of 52 kg with the mount weight of only 26 kg
  • 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
  • Polar alignment routine for those who can't see the Pole Star
  • Go2Nova® 8407 V2 controller with Advanced GOTONOVA® GOTO Technology with built in heater
  • Permanent periodic error correction (PPEC) or real time PEC for the CEM120EC and CEM120EC2
  • 32-channel Global Positioning System (GPS)
  • Built-in WiFi and LAN for remote operation
  • Integrated ST-4 autoguiding port
  • Advanced cable management system with more choices
  • Spring loaded, individual adjustable Losmandy saddle 

The CEM 120 is available in three versions, the CEM120, CEM120EC and CEM120EC2. The EC versions has high resolution encoders for real time nearly error free tracking, the EC2 has the encoders on both axes.

Specifications:

Capacity

 
Designation CEM120EC
Max. additional load capacity (kg)  52
Counterweight(s) (piece)  2x10kg
Interfaces  RS232, USB, LAN, WIFI
Power supply 12
Language English
Polar elevation setting (°) 0 - 68
Mounting saddle Losmandy-Style
DEC ball bearings diameter (mm) 125
DEC worm gear diameter (mm) 216
RA worm gear diameter (mm)  216
Worm gear teeth (DEC) (piece) 360
Worm gear teeth (RA) (piece) 360
Material of worm wheel Aluminium
Weight mount head only (kg) 26
Slow-motion azimuth adjustment +/- 5
Precision of tracking < +/- 0,15
DEC worm shaft diameter (mm) 26
RA worm shaft diameter (mm) 26
DEC axis diameter (mm) 80
RA axis diameter (mm)  80
RA ball bearings diameter (mm) 125
Diameter of counterweight bar (mm) 38,1
Motor type Stepper (128 micro-steps)
Software  Go2Nova8407 V2
Amperage (A) 5
Input voltage 12
Power consumption in open circuit (mA) 700
Power consumption (mA) 1800
Encoder yes

Special features

GoTo system  yes
GPS yes
Controllable via PC  yes (ASCOM)
Handcontroller yes
Level yes
Autoguider interface yes (ST-4 interface)
PEC correction  yes (permanent)

Equipment

Tripod <p> without tripod
Pole finder no

General

Total weight (kg) 46
Series CEM 
Type Mount
Type of build Equatorial
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78985967156

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 19 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
C
Verified Purchase
Candace Harding
Lake Worth, US
★★★★★ 4
Mostly well made…
Size: 9ft, Color: Dark Blue, Size: 9ft, Color: Dark Blue
The umbrella itself is made out of great fabric and the color is accurate to the photo. However, we’ve had it for less than a month and the piece that controls the angle of the umbrella has already broken off. It still works, but will always be at an angle now.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
K
Verified Purchase
Kim Strom
West Palm Beach, US
★★★★★ 5
Bright colors, sturdy made umbrella
Color: Blue Green Striped, Size: 9ft
Beautiful umbrella. The colors are bright and striking. Good sturdy design.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 11, 2026
M
Verified Purchase
Martha A. Cheves
Lowell, US
★★★★★ 5
Great Buy for quality & price
I've bought many patio umbrellas over the past 22 years and must say this is the best yet. Not just in quality but also price. I bought the 10' & it's the perfect size for my patio, I've sat under it a couple of times in the sun & the sun never gets through to me. Plus, I'm 75 yrs. old & had it put up in about 5 minutes. Great buy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 10, 2025
D
Verified Purchase
Deborah S
Dallas, US
★★★★★ 4
Perfect replacement for my old faded deck umbrellas
Color: Dark Purple, Size: 9ft
The dark purple color id great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
K
Verified Purchase
K8
Port Orchard, US
★★★★★ 5
Fantastic umbrella, fantastic price
Color: Navy Blue, Size: 9ft
This umbrella is lightweight, very durable, easy to open easy to install and easy to tilt, cannot believe the quality and how great it is especially for the price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 11, 2025

recommand products