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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
    Weight0.1322 lbs
  • included items

Product Reviews

Customer Reviews
4.8 Based on 90 Reviews
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Dave B.
United States United States

A Highly Valuable Piece of Equipment!

There's a newer version out with enhanced wifi, but for my purposes that hasn't been necessary. (I am working right next to the scope, though). Of all the equipment I've bought over the last several years, I think this was the most useful for the money spent. Seriously-- it makes alignment easier, it makes taking pictures easier, really it just makes the process easier! There is a bit of a learning curve, but compared to a lot of other apps this is easy. There are also lots of instructions online and on YouTube (check out Peter Zalinka's channel: That is a review of the new model, but he has others as well that show how to use this specific model. FWIW, I was able to use this with my Canon SL2 camera.

Eddie H.
United States United States

Exceeded expectations

Very happy with it

Jimmy W.
United States United States

It's the Apple of the telescope market.

This purchase made life simple. For those of us that don't wont to spend the first hour of the night making sure everything works and getting multiple different apps to all play well together this is it! Only down side is your locked into ZWO, but since I was already this was a no brainer for me. With a wi-fi extender I am able to set up my scope polar align then go sit in the living room spend time with the family and see everything going on with my scope outside form the I pad. Photos were taken this July in 2021 was out side with asi air pro. The best part was I got to sleep and let the ASI air pro control the scope! No more staying up all night to get several hours of exposure time.

OPT Telescopes ZWO ASIair Pro, 120 Mini, & Guide Scope Kit - ZWO-ASIAIRPRO-K2 ReviewOPT Telescopes ZWO ASIair Pro, 120 Mini, & Guide Scope Kit - ZWO-ASIAIRPRO-K2 Review
Elliott L.
United States United States

Highly Recommended

I have used the ASIair Pro since May 1st and really enjoy it. I can operate my EQ6-R Pro mount and Canon Ra using my iPad mini 2. The WiFi extender is necessary in order to image from inside my house.

OPT Telescopes ZWO ASIair Pro, 120 Mini, & Guide Scope Kit - ZWO-ASIAIRPRO-K2 ReviewOPT Telescopes ZWO ASIair Pro, 120 Mini, & Guide Scope Kit - ZWO-ASIAIRPRO-K2 Review
John B.
United States United States

Doesn’t work with a Mac unfortunately

Not good, I can’t use it.

A OPT Telescopes Customer
Tracy L.
United States United States

Oops. :)

From a noob to other noobs.. this system will use your dslr/mirrorless camera as main camera to align polaris. Be sure that your camera is supported before buying this handy device. At this time it does not support sony cameras. I can't use mine as a result of this right now. Though I'm keeping it for future growth into the hobby.