Translations:Adventist Youth Honors Answer Book/Arts and Crafts/Photography/16/en
From Pathfinder Wiki
Combined with adjusting of the lens aperture, the shutter speed regulates how much light the camera will record. For a given exposure, a fast shutter speed demands a larger aperture to avoid under-exposure, just as a slow shutter speed is offset by a very small aperture to avoid over-exposure. Long shutter speeds are often used in low light conditions, such as at night.
