V1.02
Thom Hogan’s Complete Guide to the Nikon D300
Page 581
Button Press only:
Preview
The DOF Preview button acts as a
DOF Preview button [default]
FV lock
The flash is preflashed once and the
value for flash locked when the DOF
Preview button is pressed; a second
press cancels
FV lock
[default]
AE/AF lock
Holding the DOF Preview button
locks both exposure and focus
AE lock only
Holding the DOF Preview button
locks exposure
AE lock (Reset)
Holding the DOF Preview button
locks exposure, but releases the lock if
you press the button again, the meter
times out, or you press the shutter
release
AE lock (Hold)
Pressing the DOF Preview button
locks exposure until the meter times
out or you press the button again