Canon SPEEDLITE 420EX Instructions Manual page 13

Flash in Other Picture-Taking Modes
Se
M: E-TTL Autofash and Manual Exposure
When you want to set both the shutter speed and aperture, use manual
'exposure. E-TTL autotlash controls the flash output according to the
'aperture you set. The background exposure is determined by the shutter
speed and aperture combination.
'Set the camera's Command Diat
to<M>.
+ Set the high-speed sync switch to
<=
Set the desired aperture and
shutter speed.
+ Turn the camera's electronic a
+ Set shutter speed anywhere from 30
ec. to the camera's
fastest sync
'speed,
EEE 9 #2
+ Focus the subject, check that the
ete i
coat
4
|When the flash mode is sat to high-speed sync (FP flash), the Nash can
synchronize wih shutter speeds taster than the camera's fastest sync
'speed. When high-speed sync is set. the <fy> leon lights n the viewlinde,
+ Mig-spiec sy can be use io te <P> <Ty>, <A>, and <M> modos
Hig) speed sync i elective when you wart 1
(1 Bir fe backgrourd tora dayigh port
(2) Croste a catrght te sutects eves.
(3) Sohn Para shadows on te bles 108,
'wi ermal aah
1 'Sot the desired picture-taking
mode.
'Set the high-speed sync switch to
<u>