A camera sensor is a crucial component in digital cameras that captures light to create images. It converts the light that enters through the lens into electrical signals, which are then processed to form a photograph. The quality and size of the sensor can significantly affect the image quality, including factors like resolution and low-light performance. There are two main types of camera sensors: CCD (Charge-Coupled Device) and CMOS (Complementary Metal-Oxide-Semiconductor). Each type has its advantages and disadvantages, influencing aspects such as power consumption and image processing speed. Understanding these differences can help photographers choose the right camera for their needs.