ZWO ASI178MM Monochrome CMOS Astrophotography Camera

  • 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.


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  • Regular price $369.00

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ZWO ASI178MM Monochrome CMOS Astrophotography Camera

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 an excellent camera for both astronomy 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 Mega).
  • ST4 Port: Can be used connect with auto guide port of mount, for guiding.


ADC14 bit
Back Focus7.5 mm
Camera ConnectionM42 x 0.75
Color or MonoMonochrome
Delta T45C
Dynamic Range12.8 Stops
Free ShippingYes
Full Rez Frame Rate239.8fps
Full Well15ke
Max Frame Rate30fps
Mega Pixels6.4 mp
MP5 to 8 MP
Pixel Array3096 x 2080
Pixel Size2.4 microns
PS3 Microns or Smaller
Read Noise2.2e
Sensor Diagonal23.9 mm
Sensor TypeCMOS
SensorSony IMX178
Weight0.26 lbs


  • 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.


Customer Reviews
5.0 Based on 4 Reviews
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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!!!