Nikon SB-500 AF Speedlight - Manual (Page 43)

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Wireless Multiple Flash-unit Photography
Advanced Wireless Lighting
The master flash unit commands the remote flash units
to fire monitor pre-flashes.
The camera measures the reflected light.
The camera controls flash firing.
Remote flash units
(Group A)
Remote flash unit
(Group B)
Master flash unit mounted on camera
• The SB-500 mounted on the camera is the master flash unit. Other
Speedlights placed in positions as illustrated function as remote
flash units.
• Up to 2 groups (A and B) of remote flash units can be set up.
• Single or several remote flash units can be allocated for 1 group.
• Channel 3 must be used when the SB-500 is used as a remote flash
unit.
• The camera settings apply to the flash control modes of the remote
and master flash units.