Pentax K-5 II S Operating Manual page 253

Button Setting Function
Enable AF
The autofocus system
operates.
The autofocus system does
Shutter
Off
not operate when the shutter
release release button is pressed
button halfway.
pressed
Only during Live View, the
halfway
autofocus system does not
Off
(Live View only)
operate when the shutter
release button is pressed
halfway.
4
Press the
OK
button.
5
Press the
MENU
button three times.
The camera is ready to take a picture.
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