Konica Minolta dimage s304 用户手册

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WHAT IS AN EV? WHAT IS A STOP?

Ev stands for exposure value. Stop refers to click stops in mechanical cameras. A change of one Ev
or one stop will adjust the exposure calculated by the camera by a factor of two. 

Change in Ev

Change in stops

Adjustment to exposure

+2.0 Ev

+1.0 Ev

0.0 Ev

–1.0 Ev

–2.0 Ev

+2 stops

+1 stop

Calculated exposure

–1 stop

–2 stops

4X as much light

2X as much light

1/2 as much light

1/4 as much light

Sometimes the camera’s exposure meter is deceived by certain conditions.

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 pic-
ture, 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 rich-
ness of the sunset is preserved.