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When On is selected, the viewfinder and
control panel show ISO-AUTO.
When
sensitivity is altered from the value
selected by the user, these indicators
flash.
A Turning Auto ISO Sensitivity Control On or Off
You can turn auto ISO sensitivity control on or off by
pressing the W (S) button and rotating the sub-
command dial.
ISO-AUTO is displayed when auto ISO
sensitivity control is on.
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 228).
If the shutter
speed selected for Minimum shutter speed is slower than sync speed selected for Custom
Setting e1 (Flash sync speed, 0 244), the sync speed will be used as the minimum shutter
speed for auto ISO sensitivity control during flash photography.
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 304), possibly preventing the camera from selecting slow shutter speeds.
When auto ISO sensitivity control is in effect, the adjusted and
selected values appear in the information display as shown at right.
Control panel Viewfinder
W (S) button Sub-command
dial
Adjusted value
Selected value