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ZWO ASI120MM Mini Monochrome CMOS Camera


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  • Its Powerful Performance Makes it Great for Guiding!
  • Peak QE of Over 75%!
  • Pixel Array: 1280 x 960.
  • Pixel Size: 3.75 microns.
  • Read Noise: 3.5e.

Product Details

  • 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!


  • specifications

    ADC12 bit
    Back Focus8.5 mm
    Camera Connection1.25" Nosepiece & M28.5x0.6
    Color or MonoMonochrome
    Delta TC
    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
    Read Noise6.4e
    Sensor Diagonal6 mm
    Sensor TypeCMOS
    SensorOn Semi AR0130CS
    Weight0.992 lbs
  • included items

Product Reviews

Customer Reviews
4.5 Based on 22 Reviews
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United States United States

Good, much as expected!

James C.
United States United States
My ZWO ASI120MM Mini is working great

My ZWO ASI120MM Mini is working great. I have it on my Celestron 8" Newtonian and connected "on camera" to the AVX mount. I'm using it as a guide camera and, so far, it's working great! The setup was easy and after I figured out how to use it with PHD2, things went smoothly.

Adit T.
Indonesia Indonesia
My First CMOS Camera

This is my first ever purchase of a CMOS camera, and i have been having such a blast. Easy to use, and such a handy equipment to have for Guiding Camera. The guys here at OPT corp has been very helpful guiding all my journey towards Astrophotography. Much recommended!

United States United States
ZWO ASI120MM Mini Monochrome CMOS Camera you recently purchased! Shoppers in the astronomy community rely

Excellent camera image and sensibility. Excellent OPT customer service and technical support. Always is nice to deal with you OPT

A OPT Telescopes Customer
Mitchell T.
United States United States
This saved my guiding efforts

I originally purchased a QHY5L-II guide camera and had issues right away. I spent a few weeks doing everything from parsing event logs and windows crash reports (yes, blue screens!) to formatting and reloading windows on my laptop to get the QHY camera to work. It didn't PHD2 and TheSkyX would crash while using the QHY camera after about 10-30 minutes of use. I had a **** of a time finding stars as well. I returned the QHY Camera for a ZWO 120mm Guide Camera. I Immediately plugged it into my imaging laptop. No need to download drivers, because I have them for the ASI1600MM camera I image with. For 24 hours, I ran the camera in PHD2 in my home office. I never had a single error, glitch or crash in any software. For two weeks now, I've been able to image all night with PHD2 running in the background, guiding happily. If you have an OAG, and need a good camera, this will work. If you already have a ZWO camera and have no stability issues with the software this camera will do everything you need it to do. I am going to knock a star off the review, however, because in my experience this camera can be quite noisy when doing exposures under 1s. Guiding with 2x2 binning and 3s subs however gives amazing SNR for guiding.

Anand V.
United States United States
Excellent Experience

Item was delivered fast and on time.