Canon EOS 90D, Instruction Manual, Page: 381 / 888

169
Flash Function Settings
Flash Firing
Set to
[
a
]
(in Basic Zone or <
d
> modes)
to have the fl ash fi re automatically, based
on shooting conditions.
Set to
[
D
]
to have the fl ash always fi re
when you shoot.
Select
[
b
]
(in Creative Zone modes) to
keep the fl ash off , or if you will use the AF-
assist beam.
E-TTL II Flash Metering
M
Set to
[Eval (FacePrty)]
for fl ash metering
suitable for shots of people.
Continuous shooting speed for
[
o
]
will
become slower than when
[Evaluative]
or
[Average]
is selected.
Set to
[Evaluative]
for fl ash metering that
emphasizes fi ring in continuous shooting.
If
[Average]
is set, the fl ash exposure will
be averaged for the entire metered scene.
o
Even with setting
[Eval (FacePrty)]
, the expected result may not be obtained
depending on the shooting conditions and subject.
Red-eye Reduction
Set to
[Enable]
to reduce red-eye by
emitting the red-eye reduction lamp before
fi ring the fl ash.