Creative Camera Gadget

The size of the aperture and the brightness of the scene controls the amount of light that enters the camera during a period of time, and the shutter controls the length of time that the light hits the recording surface. Equivalent exposures can be made with a larger aperture and a faster shutter speed or a corresponding smaller aperture and with the shutter speed slowed down.
Shutters
Although a range of different shutter devices have been used during the development of the camera only two types have been widely used and remain in use today.