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Autofocus
ADVANCED PHOTOGRAPHY—AUTOFOCUS
For more information on:
pg. 81 Manual focus
The Focus-Mode Selector
When the focus mode selector (A) is set to S (single-servo autofocus) or C (con-
tinuous-servo autofocus), the camera focuses automatically when the shutter-re-
lease button is pressed halfway (B).
A B
When your subject is stationary, single-servo AF allows you to lock focus on the
subject by keeping the shutter-release button pressed halfway (or either of the AF-
ON buttons pressed). The camera remains focused at the distance of the original
subject as long as the shutter-release button is pressed halfway (or either or the AF-
ON buttons held down), even if you re-frame the photograph so that the subject is
no longer in the selected focus area. To ensure a sharp image, the shutter can only be
released when the camera is in focus.
Continuous-servo AF can be used with moving subjects to allow the camera to
continually reassess the distance to the subject in the focus area and adjust focus as
necessary. The shutter can be released even when the camera is not in focus (re-
lease priority).
In both single-servo and continuous-servo AF, the focus target is selected from one
of five focus areas using the multi selector.