A CMOS (Complementary Metal–Oxide–Semiconductor) is a type of metal–oxide–semiconductor that is one of two types of sensors used in digital cameras, the other being CCD. CMOS sensors are equipped with “rolling shutters,” which expose different parts of the frame at different points in time. This can lead to skew, wobble, and partial exposure in photographs. However, neither technology is a clear winner over the other in overall image quality.

CMOS sensors consume around 100 times less power than equivalent CCD sensors leading to longer battery life. CMOS cameras are now more popular and currently used in most modern digital cameras. CMOS sensors can be fabricated on a standard silicon production line and are therefore less expensive compared to CCD sensors.