Pentax 67II - Manual (Page 52)

ADVANCED OPERATION
50
To set the shutter speed dial to a
position other than b, turn the
shutter speed dial while holding
down the shutter speed dial lock
button.
In flash photography, when you
use the flash sync shutter speed
of 1/30 of a second or a non-
dedicated external flash unit, set
the shutter speed dial to the e
(1/30 of a second) position.
● To set the shutter speed
dial to e or a position
other than e, turn the
shutter speed dial while
holding down the shutter
speed dial lock button.