Canon 220 EX - Manual (Page 10)

Before
You
Start
10
Pilot Lamp and Test Firing
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).
AF-Assist Beam
Emission
Preconditions
Refer to page 39 for more
details on AF-assist beam emis-
sion preconditions.
PILOT
E-TTL H
PILOT
E-TTL H
Set the power switch to I.
The Speedlite 220EX starts to
recharge. When recharging is
completed, the pilot lamp lights.
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.) 1 2
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.
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.
AF-Assist Beam
220EX(E) 15-10-2002 07:11 Pagina 10