In the case of DSLR cameras, there’s also a mirror that needs to move out of the way for this to happen. These parts cover and uncover the sensor allowing the light to ‘imprint’ the image. This is because every time you shoot a photograph, there are a few pieces on your camera that go into motion.
The camera’s shutter count (shutter actuation count) can be a useful way to gauge the longevity of your gear. Like any other product, cameras have a certain lifespan.
