Kodak DCS 500 Series User Manual page 181

Predictive Focus Control
Predictive focus continuously measures the distance and speed of a subject that is moving
at a relatively constant velocity, and then predicts the subject position so that the subject
will be sharply focused at the instant of exposure.
When using a manually selected focusing point, it lights red in the viewfinder. It is used
for predictive focusing.
In automatic focusing point selection mode, cover the subject with the center focusing
point for initial focusing. After that, even if the subject moves to a different focusing
point, the camera's predictive focus function will continue to track the subject as long as it
is covered by one of the focusing points. The focusing point does not light up.
Custom Function F-4
(page 6-6)
Custom Function F-11
9-4
In AI Servo AF mode with
predictive focusing (used for sports
photography, etc.), this function lets
you momentarily lock the focus
using the AE Lock button.
In AI Servo AF mode, this function
lets you select the focusing point
with the Quick Control dial to
manually track the moving subject.