Nikon D7100 - Manual (Page 76)

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P
: Programmed Auto
In this mode, the camera automatically adjusts shutter speed and
aperture according to a built-in program to ensure optimal exposure
in most situations. This mode is recommended for snapshots and
other situations in which you want to leave the camera in charge of
shutter speed and aperture.
A Flexible Program
In mode P, different combinations of shutter speed
and aperture can be selected by rotating the main
command dial while the exposure meters are on
(“flexible program”). Rotate the dial to the right for
large apertures (low f-numbers) that blur background
details or fast shutter speeds that “freeze” motion.
Rotate the dial to the left for small apertures (high
f-numbers) that increase depth of field or slow shutter speeds that blur motion. All
combinations produce the same exposure. While flexible program is in effect, a U indicator
appears in the control panel. To restore default shutter speed and aperture settings, rotate
the main command dial until the indicator is no longer displayed, choose another mode, or
turn the camera off.
A The Shutter Speed and Aperture Displays
The shutter speed and aperture displays can be activated by pressing the shutter-release
button halfway to start the standby timer (0 38).
A See Also
See page 327 for information on the built-in exposure program.
Main command dial