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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:
- 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
4.5 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Great working air purifier for bedroom
Color: White
Works really well. The pre filter captures so much dust you can really tell it's working as it should. The screen shows how dirty the air is and you can watch it go down as it cleans, didn't think we would need that but it's been surprisingly satisfying to see the quality visually. Very quiet on the lowest setting, easy to sleep with.. gives a nice white noise. The highest still isn't bad, the volume is similar to like a normal tower fan. Design is nice, it's a good looking machine. The only negative would be how bright the small display screen is at night but we just cover it if needed. Haven't tried the oil extract diffuser and probably won't. Works very well for cigarette smell! I'm sure if we had two it would completely remove the smoke smell. Overall would definitely buy again.
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Reviewed in the United States on May 28, 2026
★★★★★ 4
Sound not an issue
Color: White
I've had this for about a month, so far works great. I smoke Cigars in my apartment and it is working good. Clears the smoke great even with the filter it came within is a bit loud on the 2nd and third setting, but it is not distracting. I leave it on the first setting over night and its quiet. Next morning there is no cigar smell. Of course I empty ash try. When I come home from work my place smells great and I hardly see see any dust on my glass TV stand and tables. I've read some bad reviews on the sound, but its something you don't hear when tv or radio is on. It really sounds like having a fan on. I would recommend this for the price. I've had other air purifiers no difference on sound.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
MOOKA Air Purifier Rocks!
Color: White
I put my Mooka Air Purifier through a very hard test running it 24 hours a day 7 days a week 30 days in a 275 sq ft area so I could provide an accurate review. My husband and I have a dog, woodburning stove, our 115-year-old is close to the road and there is a limestone quarry across the street; our house is extraordinarily dusty. We noticed an improvement the very first day using our Mooka! The nighttime setting is silent so I was able to use it all night. When we’re in the room, we use settings 1 or 2 and can watch TV. When we are out of the room, we use setting 3. Setting 3 can be loud but that is okay, I need that extra power and it does a fantastic job. My Mooka is lightweight, easy to use and a compact workhorse. Another fantastic feature is the highly effective, affordable replacement Hepa filters that have a washable foam pre-filter. I paid under $80 for our Mooka and it is worth every penny. We are ordering a second one. The proof is in our air quality at home. Tried to upload photos of the filter, but could not, sorry!
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Reviewed in the United States on March 15, 2026
★★★★★ 5
This Thing WORKS!!!
Color: White
I have to rave about the quality and the "intelligence" of this product. When I first got it, I installed it in my kitchen along an exterior wall, about 25' away from cooking appliances. I noticed within the first week that the air in our house smelled much cleaner and overall fresher. It was a noticeable difference. We live right next to a gravel road, so there is constantly dust floating around. We notice far less dust in the air as well. The purifier was very easy to set up. I removed it from the box, inserted the filter, and plugged it in.
Where I really noticed that it does a fantastic job was when a plastic packet got left on our stove element and began melting. The smoke and smell were obvious right away, and this purifier kicked in immediately, going into overdrive and running at full speed to get the smell and a little bit of smoke out of the room. I was extremely impressed.
10/10 would recommend this product.
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Way above expectations
Color: White
I was originally looking to purchase a more expensive brand to match the smaller purifier I own but this one was on sale, considerably less expensive than the one I had my eye on. I decided to give the mooka a shot and I was highly impressed. Being a smoker, I was just looking for something to help a little with air quality, I was not expecting this thing to completely filter all the air in the room, removing all the smoke and leaving behind completely pristine, clean air in 30 minutes! As I was smoking, the purifier automatically kicked into high gear, did its job and returned to the near silent setting. Awesome! The machine displays a number that corresponds with the current air quality and a light that changes from red to green, depending on the amount of particles in the air while the fan speed runs accordingly. This feature works well, smoking, cooking or anything that releases particles will instantly be detected. The build quality is on par with the more expensive unit that I have but honestly, I prefer this machine, regardless of price! During normal operation, you can barely hear it but it does get louder when the fan ramps up. On it’s higher setting, it is as loud as a box fan on medium speed and when the mooka goes max speed, it matches the sound level of a box fan set to high speed, if that helps.
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Reviewed in the United States on April 19, 2026