When AF-C is selected for viewfinder photography, this option controls whether photographs can be taken whenever the shutter-release button is pressed (release priority) or only when the camera is in focus (focus priority).

Regardless of the option selected, focus will not lock when AF-C is selected for autofocus mode. The camera will continue to adjust focus until the shutter is released.

A Custom Settings: Fine-Tuning Camera Settings

a: Autofocus

b: Metering/exposure

c: Timers/AE lock

d: Shooting/display

e: Bracketing/flash

f: Controls

g: Movie