Specifications

5.
wireless
Multi-Flash
E-TTL
Autoflash
Operation
There
are
two types
of
wireless
multi-flash
E-TTL
autoflash
oper-
ations:
O
<
RATIO
>
OFF:
All
slaves
fire
the
same
flash
output.
@
<
RATIO
>
ON:
Slaves
are
given
an ID,
either
A
or B.
The
flash
ratio
is then
set for
each
ID.
r
The
flash
ratio
can
be
set only
when
the
camera is
an EOS-3.
.
The flash
ratio
cannot
be
set with
an
EOS
EIan
II/IIE,
EOS
50/50E,
EOS
Rebel
G/500N,
EOS
IX
or EOS IX1/IX
Lite.
IFI
.
By
changing
the
distance
t{l
between
the
subject
and
slaves,
the lighting
balance
(flash
ratio)
can
be changed
accordingly.
e
Two
or more
slaves
can
be
used.
.
With
the EOS-S,
a modeling
,:'
flash
can
be
fired
to
check
the lighting
effects
before
the
picture
is
taken.
As
an
example,
two
slaves
are
used here,
one
positioned
on
the
Ieft
and
the
other
on
the right
of
the
subject.
All
the
slaves
set
at
the
same
channel
fire
at the
same
output
controlled
by
E-TTL
autoflash
to
obtain
a correct
exposure.
o
The
operation procedure
is
the same
as with
wireless
E-TTL
autoflash.
I
Sample
Multi-Flash
Setup
with
Uniform
Flash
Output
In
the
sample
flash
setup
shown
below,
the lighting
on
the left
will
be brighter
than
on
the right
of
the
subject.
Indoors
.lr
With the
EoS-g,
mat
"
suib tii#jFf
ST-E2's
flash
ratio
control
lamp is
off.
(lf
necessary, press
the <
RATIO
>
button
to
turn it
off.)
If
the
flash ratio
control
lamp
is on,
the Speedlite
may
not
fire
or a
correct
exposure
may
not
be attained.
After
turning
off the
flash
ratio
con-
trol lamp,
set
the main
switch
to
< HOLD >
to
prevent
the
flash
ratio
control
lamp
from
light-
ing inadvertantly.
8:1
t
4=1
.
2:1
.
1:1
IIIIIII
;:in
29
,,
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