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Getting Good Results with Autofocus
Autofocus does not perform well under the conditions listed below.
The shutter release may be disabled if the camera is unable to focus
under these conditions, or the focus area may be displayed in green
and the camera may sound a beep, allowing the shutter to be released
even when the subject is not in focus. In these cases, focus manually
(0 132) or use focus lock (0 135) to focus on another subject at the
same distance, and then recompose the photograph.
There is little or no contrast between
the subject and the background.
The subject contains areas of sharply
contrasting brightness.
Example: The
subject is the
same color as
the back-
ground.
Examples: The
subject is half
in the shade; a
night scene
with point illu-
mination.
The subject contains objects at differ-
ent distances from the camera.
Background objects appear larger
than the subject.
Example: The
subject is
inside a cage.
Example: A
building is in
the frame
behind the
subject.
The subject is dominated by regular
geometric patterns.
The subject contains many fine details
or is made up of objects that are small
or lack variation in brightness.
Example: Blinds
or a row of
windows in a
skyscraper.
Example: A field
of flowers.
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See Also
See page 160 for information on controlling the beep that sounds
when the camera focuses.