They use digital cameras and camcorders to produce photos and videos for their commanders. How cameras work A camera is a machine that records a picture. With film cameras, the picture is recorded on film. With digital cameras, the image is recorded on something called a charge couple device. Motion picture cameras have film, which is kept moving with a tiny motor.
Cameras work on the same basic principles.
Cameras are made up of a light-proof box with film inside and a lens at the front. There is an adjustable hole, or aperture, where light enters the box and is focused. The lens most of the time is glass, but it can also be plastic or any transparent disk. A lens refracts, or bends light. Light passes through the lens, and the light is bent to a common point, or focus.