Canon SPEEDLITE 420EX Instructions Manual page 11

Flash in Other Picture-Taking Modes
'You can aso use E-TTL autolash withthe camera set o <Av> (apenure-
priory AE}, <Tv> (shutir speed-prionty AE) o <M> (manual).
'Shutter Speed and Aperture Settings According to Mode
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tute iighrss information to determine Pe cpt output ole ar ash
+ Tha background spose le set according o The shut sowed and aperture
combinaten
+ White te 420639 main sai on, the E-TTL inccator ights automata when
You prea the camorats shite But hata,
GB nach used one wit used he <DEP> (hcl okt AE) mace, Wl be the nar a
20
Flash in Other Picture-Taking Modes
'Av: E-TTL Autoflash and Aperture-Priority AE
\When you want fo control the depth of field or when you want both the
subject ard background
exposod comecty. use aperture-prionty AE. You
set the aperture, and the camera sets the shutter speed automaticaly 1
'expose the background correctly. The E-TTL autollash exposure is based
'on the aperture you set,
+ Set the high-speed syne switch 10
<
'Sot the desired aperture.
+ = Tum the camera's electronic dia to
set the aperture,
ake the pcre.
re cscs ne o>
con Iti the viewfinder, then take
the picture.
@ Loto ight conditions. a stow syne noted it nt automaticaly, A tipod i
recommended
for siow sync speeds,
2