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ZWO ASI290MM-MINI 2.1 MP CMOS Monochrome Astronomy Camera with USB 2.0 # ASI290MM-MINI

ZWO ASI290MM-MINI 2.1 MP CMOS Monochrome Astronomy Camera with USB 2.0 # ASI290MM-MINI

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  • Compact and highly sensitive monochrome guide camera with 2.1-megapixel 1936x1096 sensor
  • Small 2.9 micron pixels and high 80% QE allows tight tracking of faint guide stars
  • Excellent for planetary imaging
  • USB2.0 Type C interface and ST4 autoguiding port
  • Ready to go out of the box with cables, adapters, and manual; Software and drivers available from manufacturer's website
  • Weighs 88g (3.1oz)

ZWO’s ASI290 Mini camera may be small, but it is mighty. An ideal guide camera or compact planetary imager, the ASI290 Mini uses a 2.1 megapixel monochrome sensor with high QE and low read noise to give an outstanding level of performance despite its compact size. With a smaller sensor than the ASI174 Mini camera, the ASI290 Mini is more affordable and works well with a small guide scope.

The ASI290 Mini incorporates a 1/3” sensor (5.6mmx3.2mm) with 1936x1096 resolution and small 2.9 micron pixels. The small pixel size results in more precise guiding because the camera can detect smaller deviations in guide star position during an exposure. The camera has, for example, about 30% better guiding precision than the ZWO ASI120-series cameras. And with a peak QE of 80% with a read noise of just 1.0e, the ASI290 Mini can detect plenty of potential guide stars in the field of view of a small guide scope.

The ASI290 Mini weighs just 3.1oz and has a diameter of 36mm. The main body of the camera slips into a 1.25” focuser and includes a M28.5X0.6 female thread. The camera uses a small Type C USB2.0 interface, the same type of connector used by many cell phones, and its ST4 port enables direct connection to the autoguiding port on the telescope mount.

ZWO is phasing out software CDs, but the camera comes with instructions to help you download the required control software and drivers directly from the ZWO website.


  • Sensor: 1/2.8″ CMOS IMX290/IMX291
  • Resolution: 2.1Mega Pixels 1936×1096
  • Pixel Size: 2.9µm
  • Exposure Range: 32µs-2000s
  • ROI: Supported
  • ST4 Guider Port: Yes
  • Focus Distance to Sensor: 8.5mm
  • Shutter Type: Rolling Shutter
  • Protect window: AR coated window
  • Operating System Compatibility: Mac, Windows, Linux
  • Interface: USB2.0
  • Bit rate: 12bit output(12bit ADC)
  • Adaptor:1.25″ / M28.5X0.6
  • Dimension: φ36mm X 61mm
  • Weight: 60g or 3.1 ounces (without lens)
  • Working Temperature: -5°C—45°C
  • Storage Temperature: -20°C—60°C
  • Working Relative Humidity: 20%—80%
  • Storage Relative Humidity: 20%—95%

Supported resolutions


  • 1936×1096: 20.4
  • 1280×960: 35.3
  • 640×480: 141.5
  • 320×240: 355.9


  • 968×548: 20.4

More resolutions can be user defined

What's in the Box

  • 1.25" Cover
  • Camera Body
  • Quick Guide
  • 0.5m USB 2.0 Cable
  • 2m USB 2.0 Cable
  • ST4 Cable
  • M28.5-CS Adapter
  • 1.25" Extender
  • Instructions for downloading drivers and software from ZWO website

Note: Occasionally, the product you receive might have a slightly different cosmetic appearance or labeling than what is shown. This can often change from batch to batch according to the whims of the manufacturer. However, you will always receive a brand new, original product as described above.

Description copyright: Agena AstroProducts - Reproduction without permission prohibited.

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