Sometimes the camera’s exposure meter is deceived by certain subjects. Exposure
compensation can be used in these situations. For example, a very bright scene,
such as a snowy landscape or a white sandy beach, can appear too
dark in the captured image. Before taking the picture, adjusting the
exposure by +1 or +2 Ev will result in an image with normal tonal
values.
In this example, the dark scene appears bright and washed-out on the
LCD monitor. By decreasing the exposure by –1.5 Ev, the richness of
the sunset is preserved.
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What is an Ev?
Ev stands for exposure value. A change of one Ev will adjust the exposure calculated by the camera
by a factor of two.
Change in Ev
Adjustment to exposure
+2.0 Ev
+1.0 Ev
0.0 Ev
–1.0 Ev
–2.0 Ev
Calculated exposure
4X as much light
2X as much light
1/2 as much light
1/4 as much light
