8. Autofocus measuring flash
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AF operating modes
Two operating modes are available with AF cameras
(depending on the camera model):
• Focusing priority (One-shot AF):
The shutter can only be released when the subject
has been sharply focused by the AF system. If the
camera’s AF system is unable to focus sharply,
then the shutter cannot be released and the flash
cannot be fired.
• Shutter release priority (AI Servo AF):
The shutter can always be tripped, irrespective of
sharp focusing.
Shots may be blurred if the release is actua-
ted before focusing has been completed by
the camera.
The AF measuring flash is deactivated in
this operating mode!
Please refer to your camera’s operating instructions
for further details about the AF modes and their
activation.
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