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Dynamic-Area AF
Back to Nikon D300 Menu
Hierarchy
by Makoto Honda
February 5, 2008
There are three AF area modes supported by D300 auto-focus system. This
is selected by the
AF mode selector lever
on the back of the
camera:
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Single-point AF |
In this mode, only
the currently set, single focus point is used.
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Dynamic-area AF |
This mode
is activated only if Continuous-AF (set by camera front lever)
is selected.*
In
this mode, when the focused subject gets out of the currently selected
focus point, the AF system uses information gleaned from the neighboring
focus points. The Dynamic AF area option below allows you to specify how
many focus points should participate in this AF decision-making.
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Auto-area AF |
In this mode, the closest
subject will be focused based on all 51 focus points. |
* If
Single-AF
is chosen, the operation is the same as Single-point AF above.
CUSTOM SETTING MENU
a Autofocus
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a3 Dynamic AF area |
This selection applies only if both Continuous-AF (set by camera front
lever) and Dynamic-area AF (set by camera back lever) are
selected.
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9 points |
The 8
points surrounding the current focus point participate in AF
decision-making. Use this when the subject is moving in a linear
fashion. |
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21 points |
The 20
points surrounding the current focus point participate in AF
decision-making. Use this if the subject is moving
unpredictably. |
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51 points |
The 50
points surrounding the current focus point participate in AF
decision-making. Use this if the subject is moving really
violently. |
51 points with
3D-tracking |
In this
mode, AF system attempts to keep the focused subject in focus by
tracking the subject's motion and dynamically changing the focus point
accordingly. Useful to shoot a fast-moving tennis player, for
instance. |
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Click
here for Summary
Chart (Manual
Pages 64-65).
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