ZWO ASI120MM Mini Monochrome CMOS Telescope Camera

  • Its Powerful Performance Makes it Great for Guiding!
  • Peak QE of Over 75%!
  • Pixel Array: 1280 x 960.
  • Pixel Size: 5.86 microns.
  • Read Noise: 3.5e.
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  • Regular price $149.00

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ZWO ASI120MM Mini Monochrome CMOS Telescope Camera

The ZWO ASI120MM Mini is a top-notch monochrome guide camera, well suited for both planetary imaging and acting as a guider to amplify the usefulness of other astronomy instruments. Despite being qualified as a 'miniature' camera, it still operates at a high level of performance; with a peak QE over 75%, a typical read noise of only 4.0e, a pixel array of 1280 x 960, and a pixel size of only 3.75 micrometers, it qualifies as a powerhouse despite its small size. It achieves all of this while presenting a small and slender profile, taking up a minimum of space in your imaging train. The interface for this camera is a Type C USB 2.0 port, similar to that found in several mobile phone types.

The ZWO ASI120 Mini Specifications at a Glance

Capture Deep-sky and Planetary Images with the Features of the ZWO ASI120 Mini 

Powerful Astrophotography Performance

Engineered with high sensitivity, precise guiding, and a peak value at over 75%, the ASI120 Mini has an incredible light-gathering ability helping you produce breathtaking images!

Accessible Mechanics

This ZWO Mini camera has one USB 2.0 type C port which is very popular among mobile phones. It can also connect to the auto guide port of a mount providing convenience and versatility!



ADC12 bit
Back focus8.5mm
Camera Connection1.25" Nosepiece & M28.5x0.6
Color or MonoMonochrome
Delta T°C Below Ambient
Dynamic Range11.2 Stops
Free ShippingYes
Full Rez Frame Rate35fps
Full Well14.5ke
Max Frame Rate224fps
Mega Pixels1.2 mp
Peak QE75%
Pixel Array1280 x 960
Pixel Size3.75 microns
Power ConsumptionUSB C
Read Noise6.4e
Sensor Diagonal6mm
Sensor TypeCMOS
SensorOn Semiconductor AR0130CS
Weight0.992 lbs


Customer Reviews

4 Based on 6 Reviews
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Christopher F.
United States United States

Excellent Guide Camera

I have been using the ASI120mm for more than two months as a guide camera attached to a Williams Optics 50mm guide scope. It replaced an aging DSI Pro that refused to play nicely with a new Win10 PC. The ASI120mm worked with PHD2 right out of the box without any problems and my guiding has been almost flawless since it arrived. I am very pleased with this camera.

Robert S.
United States United States

ASI120 Mini Monochrome Camera

Nice Camera, came right up in Indi , both locally and remote... I would recommend this as a low end guide camera. For the money , can't be beat ..

Jacques L.
South Africa

Zwo 120 asi mini

Great little guide camera! And excellent service from Opt! Thanks Opt

Scott S.
United States

ASI 120

The ASI 120 is a nice little guide camera. It connected easily and performed well.

Raymond G.
United States

Small,Inexpensive, but difficult for Ha imaging

The device performed OK and I needed a very compact camera. Haven't tried this for guiding yet, so not sure how well it will perform at this task. The software drivers are stable and reliable. I am getting used to CMOS cameras which are much noisier than CCD. If I buy another CMOS camera it will be a cooled one, which I expect would improve things greatly

Gerald S.
United States

Problems with ASI120 mini

Tried to connect as autoguider to TheSkyX Pro but the X2 plugin from ZWO doesn’t work. Tried to connect as Ascom device, which allowed me to connect to TSX but the ASI120 won’t allow simultaneous operation with my main imaging camera (QSI).