SKU: 90615342085

iOptron CEM120EC2 EQ GoTo Mount with High Precision RA + DEC Encoders

Sale price$3689.55 Regular price$4099.50
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Ships within 48 hours · Estimated delivery Aug 20 - Aug 25

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Description

iOptron CEM120EC2 EQ GoTo Mount with High Precision RA + DEC EncodersDescription 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.

The CEM120EC2 utilizes two high resolution encoders, one on each axis. The two encoders enable the mount to perform dual axes tracking. With advanced sky modeling the CEM120EC2 will be able to account and adjust for polar alignment error as well as changes in atmospheric (refractive) distortion. Fixed home sensors on each axis, allow the mount to save alignment models after power off too to be used on future nights.

Specifications:

Capacity

 
Designation CEM120EC2
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
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 90615342085

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K
keke
San Leandro, US
★★★★★ 5
Short, cute, straight to the point
Format: Kindle
This is the type of fast pace stories I love to read. I felt nothing felt incomplete. Everything went together. Loved the men loved the best friend and the Fmc. Definitely would recommend this book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2026
R
R. Jones
Belleville, US
★★★★★ 4
Fun, Steamy, and Just Enough Depth
Format: Kindle
I liked this book — it was cute, short, and exactly what I expected from a quick Omegaverse read. While it doesn’t dive too deeply into character development, there was enough personality and backstory sprinkled in to keep the relationships believable and engaging, especially given the length. What I really appreciated was that the focus stayed on the main characters and their connection. The heat, the banter, and the romance were front and center without getting bogged down in unnecessary drama. It made for an easy, enjoyable read that flowed smoothly from start to finish. I’m looking forward to the next book in the series. There was a teaser blurb at the end, but it isn’t up on Amazon yet — hopefully it’ll be posted soon so I can add it to my wish list.
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Reviewed in the United States on September 14, 2025
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N McKinney
Cuba, US
★★★★★ 3
Good But
Format: Kindle
A little disjointed at times, at least to me. This was about Lila (omega woman) and Harrison, Wesley and River (alpha males). The main characters were likeable, as was Lila's friend, Wendy. Lila finally wised up and left the alpha she had been with for a couple of years because he was an a-hole, who treated and used her horribly. She knew some, if not all, of the guys from college if I remember correctly. The guys had been looking for an omega to bond with for some time. When Lila saw Harrison again, the other two guys were out on a date with another omega but Harrison refused to go because he didn't like her. He saw Lila again and knew she was the omega they had been searching for. However, it wasn't easy for them to convince Lila of that because of the way her ex-alpha treated her. The sex was hot. There was one inconsistency. I could almost swear that when Lila first saw Harrison again, she told her best friend, Wendy, that Harrison was the lead for his pack. Then later on when she's spending time with River, she thinks he is the pack's lead. Maybe I read something incorrectly. All in all, a good story.
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Reviewed in the United States on March 13, 2026
B
bcgr
Birmingham, US
★★★★★ 5
Sweet read
Format: Kindle
A sweet steamy read of an omega who finds her worth and finds the guys that are willing to show her. The story had lovable characters with low angst and a HEA.
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Reviewed in the United States on November 7, 2025
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brenda byes-justin
Birmingham, US
★★★★★ 5
knotty book 1
Format: Kindle
Super enjoyable! What a horrible ex. Was glad to see the back of him, I was hoping I would get to see him suffer a whole lot more.
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Reviewed in the United States on October 5, 2025

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