ZWO ASI120MM Mini Monochrome CMOS Astrophotography 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

More on the Way* We do not currently have this in stock, but is a common item we carry. More are likely on the way as the manufacturer allows.
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ZWO ASI120MM Mini Monochrome CMOS Astrophotography 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 Focus8.5 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


Customer Reviews
4.4 Based on 15 Reviews
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Mexico Mexico
Very good camera very good service

I ever buy my astronomic parts in Opt, it has ever been a very good and fast service, the asi 120 mini is a very good guider i am totally satisfied with this

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.

Jacques L.
South Africa
Zwo 120 asi mini

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

Larry B.
United States United States

Amazing. Highly recommended.

United States United States
All you can ask for in guiding

Use as a guiding camera And worked no problems with PHD2 right out of the box. No port problems as seen in other reviews (newer imaging computer)

Harley K.
United States United States
Fantastic camera!!!

I use this as a guide camera, it works beautifully! Zwo cameras are so easy to use, install the drivers, hook up the camera, and you are set!