Sensor:A sensor is a device that detects and responds to some type of input from the physical environment.
Shutter:is a device that allows light to pass for a determined period of time, exposing a photographic film or a light-sensitive electronic sensor to light in order to capture a permanent image of a scene.
Mirror :
Pentaprism:
Shutter:is a device that allows light to pass for a determined period of time, exposing a photographic film or a light-sensitive electronic sensor to light in order to capture a permanent image of a scene.
Mirror :
Pentaprism: