Nikon D300s User Manual page 436

Metering selector
Rotate the metering selector to choose a metering method.
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Center-weighted (
54)
Assigns the greatest weight to the center of the frame.
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Matrix
Meters most of the frame.
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Spot
Meters the selected focus point.
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(bi) (Live view) button
Press the
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button to frame pictures in the monitor (0 27).
AF-area mode selector
Choose how the camera selects the focus point for
autofocus.
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[nJ
Auto-area AF
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The camera automatically detects the subject and selects the
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focus point.
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Dynamic-area AF
The user selects the focus point with the multi selector (if focus'
selection is locked, rotate the focus selector lock to
e).
If the
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subject briefly leaves the selected focus point in focus mode (
(03), the camera will focus based on information from
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surrounding focus points ( 53).
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Single-point AF
The user selects the focus point with the multi selector (if focus
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selection is locked, rotate the focus selector lock to
e);
the
camera focuses on the subject in the selected focus point only.
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