Nikon D6 Reference Manual page 731

Adding a Shoe-Mounted Flash Unit
Radio-controlled flash units ( 0 665) can
be combined with any of the following
flash units mounted on the camera
accessory shoe:
•
SB-5000: Before attaching the flash
unit, set it to radio-controlled master flash mode (a d icon
will appear at the top left corner of the display) and choose
group or remote-repeating flash control. Once the unit is
attached, settings can be adjusted from the camera menus or
using the controls on the SB-5000. In the case of the camera
menus, use the options listed under [Group flash options] >
[Master flash] or under [M] in the [Remote repeating
options] display.
•
SB-910, SB-900, SB-800, SB-700, SB-600: Configure the flash for
standalone use. Use the controls on the flash unit to adjust
flash settings.
•
SB-500, SB-400, SB-300: Mount the unit on the camera. Adjust
settings using the [Group flash options] > [Master flash]
item in the camera menus.
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Radio AWL