change
in
aperture automatically by means
of
the shutter-speed priority
AE
mode. In program-
med
AE,
the camera automatically chooses a
combination
of
shutter speed and aperture
for
correct exposure.
There
are
usually several combinations
of
shut-
ter speed and aperture which
will give the same
exposure. This
fact
is
the key
to
one
of
the
most
creative tools
in
photography. Find out more
about
it
in
the next three sections.
HDUDD
15.6
1
.8
1.4
o
Or
~
..,
42