Autofocus – Nikon F4 User Manual
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The F4 provides two autofocus modes — Single Servo
Autofocus (S) and Continuous Servo Autofocus (C).
Single Servo Autofocus (S)
In Single Servo Autofocus mode (S), fhe shutter cannot be re
leased until the subject is in focus; once the subject is in focus,
the focus sfays locked for as long as the shutter release button
is lightly pressed.
Continuous Servo Autofocus (C)
The camera continues focusing for as long as you keep the
shutter release button lightly pressed. The shutter release but
ton can be fully depressed anytime, regardless of focus status,
except when film advance mode selector is set to