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ZWO ASI178MM Monochrome CMOS Astrophotography Camera


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  • Pixel Array: 3096 x 2080.
  • Pixel Size: 2.4 micrometers x 2.4 micrometers.
  • Sensor Size: 7.4 mm x 5 mm.
  • Diagonal: 8.92 mm.
  • Exposure Range: 32 microseconds to 1,000 seconds.


Product Details

  • Includes the back-illuminated 6.4-megapixel resolution Sony IMX178 image sensor. This one and one-eighth inch CMOS sensor has a 3096 x 2080 pixel array and a 2.4 micrometer-square pixel size. With a 14-bit ADC, extremely low read noise of 2.2 e, and superior sensitivity, the ZWO ASI178MM is an excellent camera for both astrophotography and microscopy.

    ZWO ASI178MM Monochrome Astronomy Camera Specifications at a Glance

    ASI178MM Special Features

    Sony IMX178 CMOS Sensor 

    • High-resolution coupled with optimal dynamic range results in the Sony IMX178 back-illuminated CMOS image sensor's high sensitivity.
    • This sensor's sensitivity of 2000 mV or more per 1 um yields optimal picture quality in the visible and near-infrared light regions.
    • 14-bit ADC significantly reduces quantization noise and suppresses dark random noise resulting in high dynamic range and clear image quality.

    Versatile Design

    • USB 3.0 Port:Can provide 5 GB bandwidth to let ASI178 run at 30 fps (14-bit, normal mode) or 60 fps (10-bit, high-speed mode) at full resolution (6.4 megapixels).
    • 10bit ADC / 14bit ADC
      3096×2080 60fps / 30fps
      2560×2048 62fps / 31fps
      2048×1080 116fps / 58fps
      1280×960 130fps / 65fps
      800×600 204.7fps /102.3fps
      640×480 253.1fps /126.5fps
      320×240 479.7fps /239.8fps
      More resolutions can be defined by the user
    • ST4 Port: Can be used connect with auto guide port of mount, for guiding.
  • specifications

    ADC14 bit
    Back Focus7.5 mm
    Camera ConnectionM42 x 0.75
    Color or MonoMonochrome
    Delta T45C
    Dynamic Range12.8 Stops
    Free ShippingYes
    Full Well15ke
    Max Frame Rate479.7fps
    Mega Pixels6.4 mp
    Pixel Array3096 x 2080
    Pixel Size2.4 microns
    Read Noise2.2e
    Sensor Diagonal23.9 mm
    Sensor TypeCMOS
    SensorSony IMX178
    Weight0.26 lbs
  • included items

    • ZWO ASI178MM Monochrome Astronomy Camera.
    • 2.5 mm All Sky Camera Lens Adapter.
    • 1.25-inch Nosepiece.
    • 1.25-inch Clear Window.
    • USB Cable.
    • ST4 Guider Cable.
    • Software.


Product Reviews

Customer Reviews
5.0 Based on 6 Reviews
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  • IR filter
  • ASI178MM
  • goto mount
  • hunderd
  • weight difference
  • mono cameras
  • choice
  • cost
  • process
  • subs
Jeff S.
United States United States

Great Camera

There is a learning curve with the mono cameras, but it is worth it. The weight difference between the ASI178MM compared to a DSLR is better for my smaller scope and mount. With the bigger scopes and goto mount I'm not as concerned about the camera falling off the scope as the mount slews. With this little camera it's much fast to get your subs over the amount of exposure time that is required for a DSLR. I compared the cost of this scope with buying a DSLR and turning it into a dedicated astro camera. It's a couple hunderd for the camera (used) and hoping to get one that still works. Then the process of removing the IR filter and not ******** it up. Well, for me the choice was clear. OPT was really fast with the shipping, too.

Pierre-René B.
Switzerland Switzerland


Very nice camera. Easy to set-up and good images immediately. I was agreably surprised to receive an all-sky lens with the camera that is nice for first tests and could be useable further.


ZWO guide camera

Great service from OPT as usual, recommended for any astrophotographer.

Jan K.
United States

Works really well

I haven't tried anything fancy yet, but the camera works as expected. When I bought it I saw that it was marketed as a planetary camera, but that doesn't do it any justice. It also works really well for deep space objects. Now if I only can get the tracking of my Nexstar 6se to behave.

William A.
United States

Very pleased with the service and product

The camera I ordered came earlier than I had hoped for. The service at OPT is very good.

Jesus D.

First planetary camera

I have not a good clear night sky, but even at poor atmospheric conditions I took a few excellent photos of some clusters , orion nebula and of course the moon. I am learning to use it. Optcorp has a excellent customer service. I am from Mexico and I was attended in Spanish, great!!. I hope upgrade my equatorial mount soon. Clear Sky's from Mexico!!!