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Bracketing
Bracketing automatically varies exposure, flash level, Active
D-Lighting (ADL), or white balance slightly with each shot,
“bracketing” the current value.
Choose in situations in which it is
difficult to set exposure, flash level (i-TTL and, where supported,
auto aperture flash control modes only; see pages 185, 301, and
382), Active D-Lighting, or white balance and there is not time to
check results and adjust settings with each shot, or to experiment
with different settings for the same subject.

❚❚Exposure and F lash Bracketing

To vary exposure and/or flash level over a series of photographs:
Exposure modified by:
0 EV
Exposure modified by:
–1EV
Exposure modified by:
+1EV