Pentax 67II Operating Manual page 43

● You can also display the
indicators in the viewfinder
by pressing the memory
lock button h instead of
depressing the shutter
release button halfway
down. This is useful when
you are using a Cable
Release.
However, if you press the
memory lock button h in
the Aperture-Priority AE
Mode, the memory lock
function is set. Press the
memory lock button h
again before taking a
picture.
2
3
4
BASIC OPERATION [SHOOTING]
Depress the shutter release button halfway
down. The shutter speed and film counter
indicator are displayed in the viewfinder.
Cock the shutter.
Depress the shutter release button fully.
41