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Auto ISO sensitivity control au-
tomatically adjusts ISO sensitiv-
ity if optimal exposure can not be
achieved at the value selected by
the photographer. If Auto is se-
lected for Minimum shutter speed, the camera will also ad-
just the threshold for auto ISO sensitivity control according
to the focal length of the lens (CPU lenses only), a feature you
will nd particularly convenient when using zoom lenses (see
sample photos at right).
To enable auto ISO sensitivity control, select On for ISO
sensitivity settings > Auto ISO sensitivity control in the
shooting menu.
Maximum
sensitivity
Choose the maximum value available for auto ISO sen-
sitivity control (200–Hi 2). The minimum is ISO 100.
Minimum
shutter
speed
In exposure modes e and g, sensitivity will only be
adjusted if shutter speed would otherwise be slower
than this value (¼ –1 s or
Auto). Highlight Auto and
press 2 to choose whether
the camera gives priority
to shutter speed (Slower)
or ISO sensitivity (Faster)
when Auto is selected.
Quick Tips
2. Auto ISO Sensitivity Control
2. Auto ISO Sensitivity Control
Focal length: 24 mm
Shutter speed: ½ s
ISO sensitivity: 900
Focal length: 50 mm
Shutter speed: ⁄ s
ISO sensitivity: 2500
Focal length: 70 mm
Shutter speed: ⁄ s
ISO sensitivity: 4500
Focal length: 100 mm
Shutter speed: ⁄ s
ISO sensitivity: 6400
The S Button
Auto ISO sensitivity control can be
turned on or o by pressing the
S button and rotating the sub-
command dial.