Reference Guide
Table Of Contents
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8.
HIGH PERFORMANCE FLASH
SYSTEM.
When
Canon
introduced
the
T90
in
1986,
its
advanced
through-the-Iens
flash
system
astounded
the
entire
photo
industry,
offering
highly
sophisticated
performance
with
simple
operation.
Concepts
such
as
A-TTL,
Second
Curtain
Sync,
and
auto
fill-in
flash
with
slow
shutter
speeds
were
pioneered
by
the
300TL,
and
have
since
been
imitated
(and
advertised)
by
our
competitors.
The
EOS-l
flash
system
continues
the
Canon
tradition,
by
providing
even
higher
performance
with
improved
reliability.
Introducing
the
New
Speedlite
430
EZ.
The
new
430
EZ,
introduced
along
with
the
EOS-l,
has
the
highest
performance
level
of
any
Canon
Speedlite.
New
features
include
selectable
fill-in
flash
ratio
and
a
heavy-duty
external
battery
pack
for
extended
shooting
sessions.
A
locking
pin
has
also
been
added,
to
guarantee
secure
attachment
to
the
camera's
accessory
shoe.
The
430
EZ
is
based
on
the
popular
420
EZ,
and
contains
all
of
the
features
of
that
flash
in
addition
to
its
own.
Fast,
internal
motorized
autozoom
matches
flash
coverage
to
focal
length
in
use,
from
24mm
to
80mm.
Second
Curtain
Sync
fires
the
flash
at
the
end
of
the
exposure
rather
than
the
beginning,
producing
exciting
creative
possibilities.
An
illuminated
data
panel
shows
useful
information,
especially
in
dark
shooting
conditions.
Canon's
exclusive
A-TTL
flash
AE
mode
is
also
provided.
A-TTL's
unique
feature
is
a
small
pre-
exposure
flash
burst
which
measures
approximate
subject
distance
and
reflectivity,
even
in
bounce
flash.
Unlike
other
systems,
A-TTL
can
provide
confirmation
of
correct
flash
exposure
before
the
picture
is
taken.
A-TTL
provides
fully
automatic
fill-in
flash
with
a
special
program
that
adjusts
the
fill-in
flash
ratio
according
to
the
level
of
available
light.
However,
the
430
EZ
also
allows
the
photographer
to
override
the
automatic
ratio
by
up
to
+/-
3
stops
in
1/3
step
increments.
This
feature
can
be
used
in
all
exposure
modes
for
superb
flexibility
and
control.
When
Manual
mode
is
selected
on
the
EOS-l,
the
430
EZ
operates
in
TTL
mode.
The
photographer
can
control
both
shutter
speed
and
aperture
settings
for
various
effects.
The
flash
data
panel
displays
usable
distance
ranges
based
on
aperture
selection
and
lens
focal
length
when
used
for
direct
flash.
When
Manual
Flash
is
selected
on
the
430,
the
photographer
can
select
power
ratios
from
Full
to
1/32
power.
The
data
panel
displays
the
exact
shooting
distance
for
correct
flash
exposure.
Other
features
include
Canon's
exclusive
Low-Voltage
Rapid-Fire
flash
for
quick
recycling
with
A-
TTL
exposure
accuracy,
and
a
stroboscopic
flash
setting
that
can
be
set
for
up
to
10
flashes
per
second
for
creative
effects.
Useful
Flash
Accessories.
The
external
battery
pack,
Transistor
Pack
E,
uses
either
6
"c"
size
alkaline
batteries
or
a
21