
Specifications
Type
550EX-dedicated,
clip-on
Speedlite
tra.rsmittei
*ith
di.ect
coiEG
Compatible
Cameras
lypeAggp
cameras
(ffi
Type
B EOS
cameras
(Manual
flash)
-
Channels
4
Flash
Ratio
Control
For
A:B
ratio:
1:8
to 1:1
to
8:1. in half-sten incro-o 13
High-Speed
Sync
(FP
flash)
Enabled
with
high-speed
sync
mode
lx
Slave
Operation
Confirmation
With
test
transmission
button.
Flash
Exposure
Confirmation
l
Before
flash
frres
during
FE
lock
Adequate
flash
exposure
indicated
by the
I
icon
lit
in the
viewfinder.
Insufficient
flash
exposure
indicat-
ed
by the
I
icon
blinking
in
the viewfrnder.
2 AfLer
flash
frres
ST-E2's
flash
confrrmation
lamp
lights
in
green
for
B
sec.
Wireless
slave
SE mode
cancellation
Uancels
when
the
test
transmission
button
or FE lock butfon is nressod tn frrrn nn +ha al6-^
Wireless
Transmission
Infrared
pulse
Transmission
Ranse
Indoors:
Approx.
12
-
15 meters
/ 89.4
-
49.2
ft
outdoors:
Approx.
s
-
ro
--tersffil
-1t.8
ft
t40'horizontal
Transmission
Coverage
Battery
Life
Approx.
l.5uu
transmlssrons
(At
room
temperature
and
with
a new
set
of
batteries.)
:-
Approx.
O.A
to
AF-assist
Beam
AF-assist
Beam
Effective
Range
SE
Feature
Whi]ethepowerswitchissetto|orHoLD,thetransmitte"d
non-use.
Power
Source
2CR2
lithium
(6
V)
batterv x
1
Dimensions
62
(W)
x
51
(H)
x
80
(D)
mm
/2.4(W\ x 2.o
(H)
'-3
j
(D)
Weight
100
g
/
3.5 oz
(excluding
battery)
ffi
r
AII
data
are
based
on
Canon's
Standard
Test
Method.
r
Subject
to
change
without
notice.
Wireless
Diffe
55OEX
Wireless
Ooeration
ST-E2
550EX
(Master)
Flash
ratio control
2
sroups
A.
B
3
groups:
A,
B,
C
FEB
o
Flash
exposure
comoensation
Each
slave
is
set
manually.
Set with
master
Manual flash
Repeatine
flash
*lgh'
'*i$ffil*-rif;:,ii*lr&
35
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