Features Specifications Application Download Back
The QHY21, QHY22 and QHY23 cameras use Sony's high-sensitivity EXview HAD CCD II sensors, ICX674, ICX694 and ICX814, respectively.  These sensors have very high QE (close to 80%) and very low thermal noise.  QHYCCD's dual stage TE cooling technology reduce the sensor temperature up to -45C below ambient for exceptionally low dark current.  Compared to competing models, the QHY cameras achieve -10C to -15C extra cooling, resulting in very low noise and uniform background even during the hot summer months. 
 
The read noise of these cameras is also a highlight of their performance.  Typical read noise is around 5 electrons. Low read noise is very important when you want to capture faint deep sky objects or when using narrowband filters.  Less read noise also means you can get a better image when you stack multiple frames.  These Sony sensors all have relatively small pixels for high resolution.  Using a suitable OTA results in outstanding detail as the sample images at the bottom of this page show.
 
The QHY21, 22 and 23 offer full moisture control, including an air-proof CCD chamber with silicon gel tube socket and a CCD chamber optical window heater.  Mechanically, the QHY21, 22 and 23 are solidly built and include a USB/Power cable support.  With this support, the USB and power cable will stay solidly affixed to the camera assuring a constant electrical contact. 

 
QHY21/22/23 SPECIFICATION
Model
QHY21
QHY22
QHY23
CCD Sensor
ICX674
ICX694
ICX814
Pixel Size
4.5um*4.5um
4.5um*4.5um
3.69um*3.69um
Resolution
1940*1460
2758*2208
3388*2712
Effective Pixels
2.8mega 
6.1mega
9.2mega
Effective Image Area 8.73mm*6.57mm 13.79mm*9.93mm 12.5mm*10.07mm
AD Sample Depth
16bit
16bit
16bit
Sensor Size
2/3inch
1inch
1inch
Readout Noise 4e to 5e- 4e to 5e- 4e to 5e-
Peak QE 79% 79% 79%
Fullwell 15-20ke- 15-20ke- 15-20ke-
Monochrome Version
QHY21-M
QHY22-M
QHY23-M
Back Focal Length 17mm(±0.5 17mm(±0.5 17mm(±0.5
Guide Port
6PIN RJ11 Guide Port
Color Wheel Port 4PIN QHYCFW SOCKET
Cooling System
Dual Stage TEC(-45C below Ambient)
Camera Interface
M42/0.75
Weight
516g
 
516g
516g
 
Reference Price
USD2100
USD2595
USD2995



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