The QHY247C APS-C Camera uses a SONY IMX193 APS size color CMOS sensor. Pixel size is 3.91um and it has a 14-bit A/D with a full well capacity of 36ke-. The read noise is 1e- to 2.7e-, the lowest tested noise at the lowest gain in the entire QHYCCD COLDMOS product line making it ideal for stacking many short exposures.