ABSTRACT
The essence of photography is all about light and this is the primary ingredient for image documentation. Exposure is ultimately responsible for the formation of the image. Essentially, light and its effect on exposure create the picture. The light meter is responsible for reading the amount of light entering the camera and determining, or making suggestions for what settings should be used for that exposure situation. There are two types of light meters: a reflected light meter and an incident light meter. Light meters provide results based on three factors or calculations: ISO, shutter speed, and f-stop or aperture. The shutter controls the duration of the exposure. Focal-plane shutters are the primary shutter used in digital signal light reflex (DSLR) cameras. White balance is a very important setting on a digital camera. It allows the photographer to adjust the camera for different sources of light.
