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QHY183M Cooled CMOS Camera

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I’m selling my QHY 183M and 163M CMOS cameras and upgrading to the QHY 90A. This is a classified for the 183M. I am the original owner. The camera is lightly used and in great working condition. There are purely cosmetic scratches and indentations (see photo) where the camera has been attached to the filter wheel. Included are the camera, usb cable for attachment to your computer, power cable for a 12v source to power the cooling system, 6-pin RJ11 cable for the guide port, 4 pin cable for attachment to a filter wheel, and original packaging.

I've added an SHO mosaic of the Heart Nebula that I photographed with this camera.

I will pay shipping USPS priority to lower 48 states. Payment through PayPal.

The specs on the 183M are . . .

CMOS Sensor


AR Coating On Sensor


Pixel Size


Effective Pixel Area


Effective Pixels

20 mega 

Effective Image Area




Peak QE

84% (Monochrome)

AD Sample Depth

12bit (output as 16bit and 8bit)

Sensor Size

Typical 1 inch

Readout Noise

2.7e-@lowest gain   1.0e@high gain

Dark Current

0.0024e/pixel/sec @ -15C

Exposure Time Range


Anti-Glow Control


Shutter Type

Electric Rolling Shutter

Computer Interface


Built-in Image Buffer

128MByte DDR2 memory

Non-volatile memory / On camera storage

Build-in total 512Kbytes Flash Memory. 100Kbytes user-accessible space
for stellar ROI frames for analysis of exoplanet investigation, occultations, atmospheric seeing messurement, focus , optic analysis etc. Support 100*100 image x 10rames   50*50 image x40frames. 25*25 image x160frames 10*10 image * 1000 frames (total frame numbers is based on 8bit image)

Cooling System

Dual Stage TEC cooler (-40C below amb