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ZWO ASI290MM Mini CMOS Telescope Guide Camera

Brand: ZWO


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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 astrophotography 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
4.7 Based on 25 Reviews
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United States United States

Hardware is great customer support not good

Have not had time to test the hardware yet but I plan to use it as a guider When I tried to use the zwo setup instructions I found the software they wanted you to download ASICAP did not exist instead you have to use Asistudio Here’s what zwo customer service responded when I told them I needed a how to on using the camera as a guider I am afraid you have to learn how to use PHD for guiding, because we have plans to integrate or link PHD in our ASIStudio in the future but just not now.

Mark S.
United States United States

Need mini camera for M68OAG

Great guide camera. Very sensitive. Unfortunately, I already had the non mini version and was using for a guide scope with the old ZWO OAG and didn’t realize that the non mini version will not come to focus with the M68 OAG. It is listed on the product page but easily overlooked. If u buy the newer M68 OAG be sure to have the mini version of any ZWO guide camera.

United States United States

ZWO Guide Scope

My first CMOS astronomical camera, and I'm quite pleased. Compared to an older CCD camera, it is just as sensitive and better noise. I especially like its small size and weight.

Steven S.
United States United States

ZWO ASI290MM and OPT Customer Service

Excellent lightweight and compact monochrome camera with relatively small pixels is ideal for autoguiding with a 300mm focal length guide 'scope. OPT's customer service is excellent !

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..)