Canon Speedlite 420EX Instruction Manual - Page 14

Switch, Speed, Flash

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Main Switch The main switch has the following settings. OFF -I ii- ON Turns off the power. CCOFF -I I- ON Turns on the power. • After 90 sec. of non-use, the SE (Save Energy) mode takes effect automatically to turn off the 420EX and save battery power. • To cancel the SE mode, press the test firing button. High-Speed Sync (FP Flash) Switch The high-speed sync switch has the following settings. Sets the normal sync mode. Sets the high-speed sync mode. •U When the 420EX is used with a Type-A camera and the switch is set to < 1-1>, setting a shutter speed faster than the camera's fastest sync speed sets the high-speed sync mode. And using a shutter speed slower than the fastest sync speed sets the normal sync mode. • When a Type-B camera is used, the normal sync mode takes effect regardless of this switch's setting. 14

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Main
Switch
The
main
switch
has
the
following
settings.
OFF
—
I
ii
—
ON
OFF
—
I I
—
ON
CC
Turns
off
the
power.
Turns
on
the
power.
•
After
90
sec.
of
non-use,
the
SE
(Save
Energy)
mode
takes
effect
automatically
to
turn
off
the
420EX
and
save
battery
power.
•
To
cancel
the
SE
mode,
press
the
test
firing
button.
High
-Speed
Sync
(FP
Flash)
Switch
The
high-speed
sync
switch
has
the
following
settings.
Sets
the
normal
sync
mode.
Sets
the
high-speed
sync
mode.
When
the
420EX
is
used
with
a
Type
-A
camera
and
the
switch
is
set
to
<
1-1>,
setting
a
shutter
speed
faster
than
the
camera's
fastest
sync
speed
sets
the
high-speed
sync
mode.
And
using
a
shutter
speed
slower
than
the
fastest
sync
speed
sets
the
normal
sync
mode.
•
When
a
Type
-B
camera
is
used,
the
normal
sync
mode
takes
effect
regardless
of
this
switch's
setting.
14