S»;j pilot lamp and test firing, S»;j pilot lamp and test firing af-assist beam – Canon 220EX User Manual
Page 11
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Before
s»;j Pilot Lamp and Test Firing
AF-Assist Beam
Set the power switch to I.
The Speedlite 220EX starts to
recharge.
When
recharging
is
completed, the pilot lamp lights.
The Speedlite 220EX AF-assist
beam is emitted automatically to
enable precise autofocus under
dim light and low contrast condi
tions. The AF-assist beam is
effective from 1 to 5 meters (3.3
to 16.4 feet).
After the pilot lamp lights,
press the test firing button
to test fire the flash. (The
pilot lamp functions as a
test firing button also.)
Refer to page 39 for more
details on AF-assist beam emis
sion preconditions.
41
The flash cannot be test fired while the shutter button Is pressed
halfway, or while the viewfinder displays the exposure setting and
remains active for a few seconds after the shutter button is pressed
halfway.
S
As a general rule, the descriptions for the remaining sections of the
Instructions assume that the power switch is set to I and that the power
of the Speedlite 220EX is turned on.
10