Nikon 8400 - Manual (Page 116)

The Shooting Menu
106
SB-800 and SB-600 Speedlights
Set the optional Speedlight to TTL mode. In this mode, SB-800 and SB-600 Speedlights
will use monitor prefl ashes for i-TTL fl ash control (Standard i-TTL fi ll-fl ash for Digital
SLR). Note, however, that the camera does not support Advanced Wireless Lighting,
auto FP high-speed sync, FV lock, or AF-assist for multi-area AF. See the Speedlight
manual for more information.
Check the fl ash-ready light on the optional Speedlight before shooting. When set to
STBY (standby), the SB-800 and SB-600 will power on and off at the same time as the
camera. If Normal is selected for Lens and the Speedlight is on, the fl ash angle will
change as the camera is zoomed in and out. If red-eye reduction (
37) is in effect,
the red-eye reduction lamp on the Speedlight will light and the camera will not emit
red-eye reduction pre-fl ashes.