47
#
#
P, S, A, and M Modes
P
,
S
,
A
, and
M
modes offer different degrees of control over shutter
speed and aperture.
Mode
Description
P
Programmed auto
(
48): Camera sets shutter speed and aperture for optimal exposure.
Recommended for snapshots and in other situations in which there is little time to
adjust camera settings.
S
Shutter-priority auto
(
49): User chooses shutter speed; camera selects aperture for best
results. Use to freeze or blur motion.
A
Aperture-priority auto
(
50): User chooses aperture; camera selects shutter speed for
best results. Use to blur background or bring both foreground and background into
focus.
M
Manual
51): User controls both shutter speed and aperture. Set shutter speed to
Bulb (
A
) or Time (
%
) for long time-exposures.
A
Lens Types
When using a CPU lens equipped with an aperture ring (
296), lock the aperture ring at the
minimum aperture (highest f-number). Type G lenses are not equipped with an aperture
ring.
Non-CPU lenses can only be used in modes
A
(aperture-priority auto) and
M
(manual), when
aperture can only be adjusted using the lens aperture ring. Selecting any other mode
disables the shutter release.
A
Non-CPU Lenses (
Use the lens aperture ring to adjust aperture. If the maximum
aperture of the lens has been specified using the
Non-CPU lens
data
item in setup menu (
149) when a non-CPU lens is attached,
the current f-number will be displayed in the viewfinder and
control panel, rounded to the nearest full stop. Otherwise the
aperture displays will show only the number of stops (
F
, with
maximum aperture displayed as
F
A
) and the f-number must be
read from the lens aperture ring.
Summary of Contents for D7100
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