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ZWO ASI290MM Mini CMOS Telescope Guide Camera


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  • ZWO ASI290MM Mini is one of the best-selling guide cameras in the industry.
  • Doubles as a planetary camera.
  • Pixel Array: 1936 x 1096.
  • Pixel Size: 2.9 Micrometers.
  • Read Noise: 1.0 e.
  • Peak QE: 80%.

Product Details

  • A Go-To for Guiding and More

    The ZWO ASI290MM 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.

    A Powerhouse in a Small Package

    With a peak QE over 80%, a read noise of only 1.0 e, a pixel array of 1936 x 1096, and a pixel size of only 2.9 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. 

    ZWO ASI290MM Mini Specifications at a Glance


    USB 2.0 Port: Its Type C port is very popular in mobile phones.

    ST4 Port: Can connect the mini camera directly to the autoguider port of the mount.

  • specifications

    ADC12 bit
    Back Focus8.5 mm
    Camera ConnectionM28.5x0.6 / Type C mount
    Color or MonoMonochrome
    Delta T45C
    Dynamic Range12 Stops
    Free ShippingYes
    Full Rez Frame Rate20.4fps
    Full Well14.6ke
    Max Frame Rate355.9fps
    Mega Pixels2.1 mp
    Peak QE78%
    Pixel Array1936 x 1096
    Pixel Size2.9 microns
    QE Peak80%
    Read Noise3.1e
    Sensor Diagonal6.5 mm
    Sensor TypeCMOS
    SensorSony IMX290
    Warranty2 Year Warranty
    Weight0.1322 lbs
  • included items

    • Camera Body.
    • 1.25-inch Cover.
    • User Manual.
    • Software CD ROM.
    • 0.5 m USB 2.0 Cable.
    • 2 m USB 2.0 Cable.
    • ST4 Cable.
    • M28.5-CS Adapter.
    • 1.25-inch Extender.

Product Reviews

Customer Reviews
4.8 Based on 21 Reviews
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Filter Reviews:
Manlio G.
United States United States
The perfect camera for guiding!

I update mine 120mm camera with the 290mm. Very happy I did! Guiding improved!

James P.
United States United States
Can't get it to connect

Great little camera but I'm having a heck of a time trying to get it to connect with my Paramount 11000-s. So far no one has been able to help me. No first light until this happens! (help..)

Eric G.
United States United States
Works perfectly

I'm using this as a guide camera and it works perfectly. It's threaded to accept filters if desired. Does the job, no complaints. I downloaded the drivers from the website, which was very easy, hooked the camera up and was running in minutes.

Rodney H.
United States United States
I'm Very Happy with it 5 Star

Fast shipping good price "Thank you"

Paul A.
United States United States
Great for oag

Excellent. Easy to get set up and works fine. Much easier to adjust focus on my zwo off axis guider (oag) than my previous guide camera an asi224. My first night tested I got consistent accurate guiding with rms error in range of .4 to .6 most of night even with average to poor seeing conditions. Tight sharp stars with 5 minute long exposures on a 1000mm focal length scope. Much better than what i had before.

Kris H.
United States United States
Excellent for guiding

This camera pairs very nicely with the ZWO OAG and helical focuser. The sensitivity is great and I get dozens of stars with very moderate gain despite the tiny 8mmx8mm prism on the OAG. Along w the helical focuser, it is very easy to get this camera focused and locked into place. I really like that this camera is a "mini" version, and that the sensor is built into the "male end" of the nosepiece. With a non-mini camera, you can add a nosepiece but the sensor remains at the "female end" of the hollow nosepiece tube, creating a distance the length of the nosepiece that you can never shorten. With this mini camera that has the sensor at the male end, I am able to get the sensor right up to the OAG stem by set screw and helical focuser. While this may seem trivial, that distance saved me the trouble of moving my entire OAG up the optical train. I highly recommend this camera for guiding.

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