Nikon D5 - Manual (Page 80)

80
This option determines the slowest shutter speed available when
using front- or rear-curtain sync or red-eye reduction in
programmed auto or aperture-priority auto exposure modes
(regardless of the setting chosen, shutter speeds can be as slow as
30 s in shutter-priority auto and manual exposure modes or at flash
settings of slow sync, slow rear-curtain sync, or red-eye reduction
with slow sync).
Choose how the camera adjusts flash level when exposure
compensation is used.
Choose the reference used to set exposure when a flash is used
with auto ISO sensitivity control.
e2: Flash Shutter Speed
G button
➜ A Custom Settings menu
e3: Exposure Comp. for Flash
G button
➜ A Custom Settings menu
Option Description
YE
Entire frame
Both flash level and exposure compensation are
adjusted to modify exposure over the entire frame.
E
Background
only Exposure compensation applies to background
only.
e4: Auto M ISO Sensitivity
Control
G button
➜ A Custom Settings menu
Option Description
e
Subject and
background
The camera takes both the main subject and
background lighting into account when adjusting
ISO sensitivity.
f
Subject only
ISO sensitivity is adjusted only to ensure that the
main subject is correctly exposed.