Nikon 4500 - Manual (Page 80)

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Beyond Point-and-Shoot—Sensitivity (ISO Equivalency)
ISO 200 and Above
The higher the sensitivity, the more likely your pictures are to be affected by
“noise” in the form of randomly-spaced, brightly-colored pixels. We recom-
mend that you choose a setting of 100 except when high shutter speeds are
required. When 800 is selected, the ISO indicator in the monitor will turn red
to indicate that pictures taken at this setting will likely contain appreciable
amounts of noise. We recommend that Image Sharpening (
105) be
turned off at this setting to avoid heightening the effects of noise. A setting
of 800 is recommended only to capture natural lighting under low light con-
ditions or when a fast shutter speed is required to avoid blur.
In P, S, A, and M modes, sensitivity (ISO equivalency) can be raised above the
default level (roughly equivalent to ISO 100) according to your subject and
lighting conditions.
Sensitivity can be set to ISO 100, 200, 400, or 800 equivalent or AUTO. If
AUTO is selected, the camera will automatically raise sensitivity above the
default value when lighting is poor. To select a setting for sensitivity, first
select P, S, A, or M mode. Press the
button and rotate the command dial
to cycle through settings as shown below. The current setting is displayed in
the monitor.
When sensitivity is set to AUTO, an ISO icon will appear in the monitor when
sensitivity is above ISO 100 equivalent. In manual and shutter-priority auto
exposure modes, AUTO is equivalent to a setting of 100, and sensitivity will
not be raised when lighting is poor.
Sensitivity (P, S, A, and M)
Reacting Faster to Light
+
ISO
100 200 400 800 AUTO