More on Photography
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Sensitivity (Shooting Modes
and
Only)
Sensitivity
(ISO equivalency) is the digital equivalent of fi lm speed. The higher
the sensitivity, the less light needed to make an exposure, allowing higher
shutter speeds and smaller apertures. Much as fi lm with a high ISO rating
tends to produce “grainy” images, high sensitivities may be associated with
“noise”—randomly spaced, brightly colored pixels concentrated in dark parts
of the image. Noise reduction (
101) can be used to reduce noise in pictures
taken at shutter speeds of ¼ s or slower.
In
(auto) and scene modes, the camera automatically raises sensitivity
when lighting is poor. In shooting modes (Custom 1) and (Custom 2),
the following options are available:
Option
50
Approximately equivalent to ISO 50. Recommended unless lighting is poor
or faster shutter speeds are required (e.g., when the subject is moving).
Noise may appear in pictures taken at settings above this value.
100
Approximately equivalent to ISO 100.
Description
200
Approximately equivalent to ISO 200.
400
Approximately equivalent to ISO 400. Intended for use with natural light-
ing; not recommended when using fl ash.
AUTO
Approximately equivalent to ISO 50
under normal conditions; when light-
ing is poor, however, camera automatically compensates by raising sensi-
tivity to maximum of ISO 200 equivalent (
36).
To choose a value for sensitivity:
Press
button and rotate command dial until desired setting is displayed. At set-
tings other than
AUTO
, sensitivity is shown in shooting display during shooting.
100
100
100
F5.6
F5.6
F5.6
1/125
125
1/125
15
15
15
8M
8M
8M
50
50
50
400
400
400
AUTO
AUTO
AUTO
100
100
100
200
200
200
Exposure Mode
If
AUTO
is selected in shutter-priority auto or manual exposure mode, sensitivity will be
fi xed at ISO 50 equivalent and will not vary with lighting conditions.
