The QHY5-III 224 C uses the SONY IMX224, a 1/3inch ultra low readout noise CMOS sensor . The sensor is declared as the highest sensitivity CMOS sensor in SONY small sensors.
The QHY21, QHY22 and QHY23 cameras feature Sony’s latest high sensitivity ExviewII CCD sensors: ICX674, ICX694 and ICX814.
These sensors has very high QE (close to 80%) and very low thermal noise.
With dual stage TEC cooling technology these cameras can achieve temperatures 45C below ambient. By comparison with the competition, the 10 to 15C of extra cooling helps ensure great results, even on hot summer nights!