Nikon D6 Reference Manual page 423

D
Focus Shift Photography
•
The shutter speed and the time needed to record the image may vary
from shot to shot. As a result, the interval between a shot being
recorded and the start of the next shot may vary.
•
Regardless of the option selected for Custom Setting c2 [Standby
timer], the standby timer will not expire while shooting is in progress.
•
If you are using a flash, choose an interval longer than the time needed
for the flash to charge. If the interval is too short, the flash may fire at
less than the power needed for full exposure.
•
If shooting cannot proceed at current settings, for example because
shutter speed is set to A ("Bulb") or % ("Time"), a warning will be
displayed.
•
Changing camera settings while focus shift photography is in progress
may cause shooting to end.
D
Adjusting Settings Between Shots
Shooting and menu settings adjusted between shots. Note, however, that
the monitor will turn off approximately 2 s before the next shot is taken.
Varying Focus over a Series of Photos (Focus Shift Shooting)
371