1) Unit of illuminance 
Although all camera settings with the same EV nominally give the same exposure, they do not necessarily give the same picture. The f-number (relative aperture) determines the depth of field, and the shutter speed (exposure time) determines the amount of motion blur, as illustrated by the two images at the right (and at long exposure times, as a se...
(from the article `photography, technology of`) An attempt to simplify the mathematics of f-number and shutter speed-control functions led to the formulation of exposure values (EV). These run in a ...
Refers to the ability to override the auto exposure system on a digital camera to lighten or darken an image
Refers to the ability to override the auto exposure system on a digital camera to lighten or darken an image.