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The [AF pt auto switching] parameter is only for
switching between multiple AF points, so it is unavailable
when using AF area selection modes [Single-point Spot
AF] and [Single-point AF]. The [0] setting is a standard
setting for moderate switching of AF points. The [+1/+2]
settings are used when shooting subjects with erratic
movement which could happen in any di rect ions. When
a manually selected AF point (AF point being focused
during Zone AF) leaves the subject, it will rapidly switch
to surrounding AF points to capture the subject. Use the
[+] setting when you want the camera to automatically
decide (switch) to use a new AF point, and the [0] setting
i s used when you want to place emphasis on manually
selected AF points to track the subject.
[+1/+2] setting is most effective for sports
with lots of movement where the subject can
easily move out of the selected AF point