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Additional
Exposure (photography)
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Exposure (photography)
In
photography
,
exposure
is the amount of light per unit area (the image plane
illuminance
times the exposure time) reaching a
photographic film
or electronic
image sensor
, as determined by shutter speed, lens
aperture
and scene
luminance
. Exposure is measured in
lux
seconds
, and can be computed from
exposure value
(EV) and scene luminance in a specified region.
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