EXPOSURE

Exposure in Photography refers to the film or digital sensor being exposed to the correct amount of light to produce an image with detail in the dark areas (shadows) and detail in the bright areas (highlights).

The key to correct exposure is the light meter, hand-held or built into the camera, all modern cameras have built-in light meters that measure the light entering the lens and sets the Aperture (f-stop) and shutter speed automatically, all of this is done when you press the shutter button.

Some cameras give you the option to set the exposure manually, you can be creative setting the aperture to control depth of field and setting shutter speeds to freeze action or blurring the image to exaggerate motion (use slow shutter speeds.)