ZWO ASI174 Mini Monochrome CMOS Astrophotography Guide Camera

  • Great for Planetary Imaging and Guiding! 
  • Pixel Array: 1936 x 1216.
  • Pixel Size: 5.86 microns.
  • Read Noise: 3.5e.
  • Peak QE: 77%.
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  • Regular price $499.00

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ZWO ASI174 Mini Monochrome CMOS Astrophotography Guide Camera

The ASI174 Mini is a top-notch monochrome guide camera, well suited to both planetary imaging 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; with a peak QE of 77%, a read noise of only 3.5e, a pixel array of 1936 x 1216, and a pixel size of only 5.86 microns, 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. 


The ASI174 Mini Specifications at a Glance


ASI174 Mini Specs

Capture the Stars with Dynamic Features of the ASI174 Mini

Powerful Astrophotography Performance

Engineered with high sensitivity, precise guiding, and a peak value at 77%, the ASI174 Mini has an incredible light-gathering ability helping you produce breathtaking images! 

USB 2.0 Port & ST4 Port

This Mini camera has one USB 2.0 type C port which is very popular among mobile phones. It can also connect to the auto guide port of a mount via its ST4 port providing convenience and versatility!


ADC12 bit
Back Focus8.5 mm
Color or MonoMonochrome
Dynamic Range12 Stops
Free ShippingYes
Full Rez Frame Rate128fps
Full Well32.4ke
Max Frame Rate740fps
Mega Pixels2.4 mp
MP2 to 4 MP
Peak QE78%
Pixel Array1936 x 1216
Pixel Size5.86 microns
PS4 to 6 Microns
QE Peak77%
Read Noise3.5e
Sensor Diagonal13.4 mm
Sensor TypeCMOS
Warranty2 Year Warranty
Weight0.9 lbs



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5.0 Based on 2 Reviews
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Jihong C.
United States United States
one of the best for OAG and planetary imaging

never failed getting a guide star. superb imaging for Jupiter and Saturn on my C8 SCT

Dave W.
United States United States
Great Guide Camera for Long Focal Lengths

At 2030mm I was able to find guide stars. I was in a hurry, so I didn't take the time tweak the settings. I did create a dark library, though. I only cranked the gain and binned 2x2 in PHD software. It got me through the night. The only issue was with the ZWO OAG, not the camera. The camera has a very wide FOV, but the prism on the OAG, not so much. With the ZWO OAG you get a small circle to locate your guide stars. But thanks to the sensitivity of the camera, you find guide stars easily.