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QHY183 Colour Camera


20 Megapixel, High Res, High QE, Back-Illuminated Cooled COLDMOS Camera

The QHY183C is a one-inch, 20 Megapixel back-illuminated colour CMOS camera with a peak QE of 74%. The pixel size is 2.4um, yielding high-resolution with modest size telescopes. The camera is capable of producing 15FPS@20 Megapixels. It has a two-stage TEC that cools the sensor to -40C to -45C below ambient. The ADC is 12-bit / 16-bit with 1e- read noise! The computer interface is USB 3.0 and exposure times can be set from 50us to 3600sec.

Sony's Image Sensor Exmor R is a back-illuminated CMOS image sensor with improved sensitivity and noise reduction - the key factors to enhancing image quality, while radically realigning their fundamental pixel structure from front-illumination to back-illumination. It retains the advantages of CMOS image high-speed operation while dramatically improving sensitivity.

The QHY183C has a 128MB DDR Memory Buffer. A QHY183M 16-bit image is about 40MB, so 128MB of memory can easily buffer a full frame for transfer to the computer using QHY183M software with native single-frame shooting function, instead of intercepting a frame from a continuous video transmission. This makes data transfer to the computer stable and reliable because there is no USB bandwidth or busy CPU problems.

The QHY183C utilizes the Anti-Dew features common to the QHY COLDMOS cameras. A heated optical window prevents exterior dew from forming, and the CMOS chamber has a desiccant plug socket to prevent moisture from forming on the sensor at cold temperatures.

The QHY183C incorporates QHY’s Anti-Amp Glow technology to significantly reduce typical CMOS amplifier glow to a minimum, allowing excellent calibration by subtracting a dark frame.

Sensor Sony IMX183 Back-Illuminated CMOS
Optical Format Typical 1-inch
Sensor Size 13.3mm x 8.9mm
Pixel Size 2.4um x 2.4um
Efective Pixels 5544 x 3694, 20 Megapixels
Binning 1 x 1
Readout Type Progressive Scan
Shutter Electronic Shutter
Exposure Time 50us-3600 sec
Frame Rate 15FPS@20Mp, 25FPS@4K HD, 5FPS@12Mp
Peak QE 84%
Read Noise 1.0e@high gain, 2.7e-@Low gain
Dark Current 0.0024e-/p/s@-15C
Full Well 15ke- to 16ke-
Cooling Delta T 2-stage TEC, -40C Regulated
Computer USB3.0
Telescope Interface M42/0.75 female thread
Weight 699g
Power 30W @ 100% TEC, 13W @ 50%TEC

The manual and software can be downloaded from

QHY Website