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3 Adjust settings.
The maximum value for
auto ISO sensitivity can be
selected using Maximum
sensitivity (the minimum
value for auto ISO
sensitivity is automatically set to ISO 100).
In modes P and A,
sensitivity will only be adjusted if underexposure would
result at the shutter speed selected for Minimum shutter
speed (
1
/1000–1 s).
Shutter speeds slower than the minimum
value may be used if optimum exposure can not be achieved
at the ISO sensitivity value selected for Maximum
sensitivity.
Press J to exit when settings are complete.
A Auto ISO Sensitivity Control
Noise (randomly-spaced bright pixels, fog, or lines) is more likely at
higher sensitivities.
Use the High ISO NR option in the shooting menu
to reduce noise (see page 176). Note that ISO sensitivity may be raised
automatically when auto ISO sensitivity control is used in combination
with slow sync flash modes (available with the built-in flash and the
optional flash units listed on page 226), possibly preventing the camera
from selecting slow shutter speeds.