Nikon D750 DSLR Camera (Body Only) - Manual (Page 379)

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6
Compose the shot.
Compose the shot and arrange the flash units as shown
below. Note that the maximum distance at which the remote
flash units can be placed may vary with shooting conditions.
7
Configure the remote flash units.
Turn all the remote flash units on, adjust group settings as
desired, and set them to the channel selected in Step 4. See
the flash unit instruction manuals for details.
8
Raise the built-in flash.
Press the M ( Y ) button to raise the built-in flash. Note that
even if – – is selected for Built-in flash > Mode , the built-in
flash must be raised so that monitor preflashes will be
emitted.
60 ° or less
30 ° or less
10 m/33 ft or less
30 ° or less
60 ° or less
5 m/15 ft or less
5 m/15 ft or less
Camera
(built-in flash)
Wireless remote sensors on flash units should face
camera.