Nikon D780 DSLR Camera (Body Only) - Manual (Page 531)

485 Remote Flash Photography
3
C : Choose the flash control
mode.
Choose the flash control mode and
flash level for the master flash and
the flash units in each group:
4
f : Group the remote flash units.
• Choose a group (A–F) for each of the remote flash units.
• The master flash can control up to 18 flash units in any
combination.
Option Description
TTL i-TTL flash control.
q A
Auto aperture (available only with compatible flash
units).
M Choose the flash level manually.
–– (off)
The units do not fire and the flash level cannot be
adjusted.