Canon Speedlite 420EX - Manual (Page 19)

Flash in Full Auto Mode
confirmation lamp lights.
• When a correct flash exposure has
been obtained, the lamp lights for
about 3 sec. If it does not light,
underexposure may have occurred.
Check that the < PILOT> is lit, then
move closer to the subject and take
the picture again.
Q • The prellash is fired to obtain a meter reading of the subject.
• The main flash is used for the actual flash exposure.
Fill Flash
Even in daylight, you can use flash as fill light to soften harsh shadows or
illuminate a dark, backlit subject.
The image has been removed due
to copyright restrictions
The image has been removed due
to copyright restrictions
With fill flash. Without fill flash.
Q With fill flash, the subject illuminated with flash might look unnatural compared to
the background's brightness. To prevent this, the flash output is reduced
automatically to obtain a more natural balance between the subject and
background brightness. This is called automatic flash output reduction.
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