Nikon D780 Reference Manual page 547

4
f : Set the remote flash units to the same channel
as the master flash.
Set the remote flash units to the channel selected in Step 3.
5
f : Group the remote flash units.
•
Choose a group (A, B, or C).
•
Although there is no limit on the number of remote flash
units that may be used, the practical maximum is three per
group. With more than this number, the light emitted by
the remote flash units will interfere with performance.
6
C / f : Compose the shot.
•
Compose the shot and arrange the flash units. See the
documentation provided with the flash units for more
information.
•
After arranging the units, press the test button on the
master flash to test-fire the flash and confirm that the units
are functioning normally. Flash units can also be test-fired
by pressing the i button in the flash info display ( 0 510)
and selecting [ c Test flash].
7
C / f : Take the photograph.
Take the photograph after confirming that the flash-ready
lights for all flash units are lit.
Remote Flash Photography
501