A4: Focus Tracking With Lock-On - Nikon D300 User Manual

Option
fC' ] ]3D 51 points
. (3D-tracking)
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3D
Description
If the subject leaves the selected focus point, the
camera will use 3D-tracking to track the subject
and select a new focus point as required. Use to
quickly compose pictures with subjects that are
moving erratically from side to side (e.g., tennis
players). If the subject leaves the viewfinder,
remove your finger from the shutter-release button
and recompose the photograph with the subject in
the selected focus point.
B
3D-tracking
When the shutter-release button is pressed halfway, the colors in the area
surrounding the focus point are stored in the camera. Consequently 30-
tracking may not produce the desired results with subjects that are the
same color as the background or that occupy a very small area of the
frame.
a4: Focus Tracking with Lock-On
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This option controls how autofocus adjusts to sudden large
changes in the distance to the subject.
- Option
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Description -
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AF: Long 'When the distance to the subject changes abruptly, the
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N"ormal---' camera waits for the specified period (long, normal, or
AF: (default) I short) before adjusting the distance to the subject. This
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prevents the camera from refocusing when the subject is
AF~
Short. briefly obscured by objects passing through the frame.
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lThe camera immediately adjusts focus when the distanEe-'
Off
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to the subject changes. Use when
phot~graphing
a series
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