（QE of QHY42)
QHY42 uses the Gsense400 Scientific CMOS sensor with extraordinary 95% peak QE, 79% UV QE and very good NIR response, plus extremely low read noise of 1.7e-. This camera is ideal for astronomical and biological science research.
Guy Wells also says:"QHYCCD have been very helpful addressing our needs. In our previous experiences with QHYCCD, they produce high quality cameras and the QHY42 is certainly no exception, and has indeed exceeded our expectations. We highly recommend it".