Page 86 - (DK) Advanced Photography Guide

84 APPLYING | CONTINUOUS AUTOFOCUS

BACK-BUTTON FOCUSING

Pressing the shutter button halfway down activates button and assign it to a different button—either
autofocus by default, but holding the shutter button AF-ON or a customizable button on the back of
also locks exposure, which you may not always want. the camera. Because of this, the technique is often
It is also very easy to press down too hard and take referred to as back-button focusing. Using a separate
a shot without meaning to. One way around this is button for focusing makes it easier for you to control
to take autofocus activation away from the shutter when autofocus is activated for action shots.

SET BACK-BUTTON FOCUSING CHOOSE CONTINUOUS AF SELECT CONTINUOUS DRIVE
Using the custom control menu, Continuous AF constantly adjusts Continuous Drive is crucial when
set your camera to stop shutter button the focus when you hold down AF-ON. you are shooting fast-moving subjects.
autofocus. You will also need to assign You will need to select an autofocus point Shoot in brief bursts, to ensure that you
focusing to another button if AF-ON is selection mode. Choose Zone AF, the most capture the key moments of the action
not present. useful mode for taking action shots. and to avoid filling the camera buffer.

HOLD DOWN AF-ON RELEASE AF-ON TO STOP FOCUSING
When your subject is in the If your subject moves behind someone
autofocus zone you selected, press and else, you can stop autofocus temporarily by
hold down AF-ON. Trigger the shutter as releasing AF-ON. You can turn it on again once
normal, keeping your thumb on AF-ON. your subject is no longer hidden.

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