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Reference—P, S, A, and M Modes
Exposure
Exposure controls the brightness of photographs. The same exposure can be
achieved with different combinations of shutter speed and aperture, allowing you
to blur or freeze motion or control depth of fi eld. The following fi gure shows how
shutter speed and aperture affect exposure.
Overexposed
(bright)
Underex-
posed (dark)
Slow Shutter speed ➤ Fast
Small
(high f/-numbers)
Aperture ➤
Wide
(low f/-numbers)