Nikon D750 DSLR Camera (Body Only) - Manual (Page 117)

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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.
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
O indicator appears in the viewfinder. 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
See Also
See page 462 for information on the built-in exposure program. For
information on activating the exposure meters, see “The Standby
Timer (Viewfinder Photography)” on page 39.
Main command dial
Viewfinder