ZWO ASI178MM Monochrome CMOS Telescope 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 Telescope 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 focus7.5mm
Camera ConnectionM42 x 0.75
Camera SeriesZWO ASI
Color or MonoMonochrome
Delta T45°C Below Ambient
Dimensions62mm x 36mm
Dynamic Range12.8 Stops
Free ShippingYes
Front or Back IlluminationBack
Full Rez Frame Rate239.8fps
Full Well15ke
InterfaceUSB 3.0
Max Frame Rate30fps
Maximum Exposure Time1000 seconds
Mega Pixels6.4 mp
Minimum Exposure Time0.000032 seconds
Operating System CompatibilityLinux (3rd Party) & Mac & Windows
Pixel Array3096 x 2080
Pixel Size2.4 microns
Power Consumption12V 2A
Read Noise2.2e
Sensor Diagonal23.9mm
Sensor TypeCMOS
SensorSony IMX178
Single or Dual SensorSingle
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

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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!!!