QHY21 QHY22 and QHY23 camera is using the sony's lastest high sensitivity ExviewII CCD sensor ICX674,ICX694 and ICX814. These sensors has very high QE (close to 80%) and very low thermal noise. With QHYCCD's dual stage TEC cooling technology these camera will get great -45C temperature below ambient. To compare with the competitor, this temperature gives -10 to -15C extra cooling and it will give you very clear background even in a hot summer.
The readout noise of QHY21,22,23 is also a highlight. It is typical 5 electrons. The readout noise is very important when you capture the faint deep sky object or using the narrow banding filter. Less readout noise means you can get better image when you stacking the same pictures. In another word, you can get same quality with less pictures.
QHY21,22,23 has a solid design. It comes with a USB/Power cable fixer. With this fixer the USB and power
79% @550nm >60%@Ha,70%@450nm
Colorwheel Communcation port
470g(not inludes the C-mount)
Optic window Anti-drew heater
3.5W(Zero Cooling) 12.8W(50% Cooling) 25.8W(100% Coolling).
Both Mono and Color Sensor Available
Airproof CCD chamber with removable silicon tube socket
The difference of QHY21 QHY22 QHY23
Effective Pixel Array Size