Canon Speedlite 550EX Instructions Manual page 33

"
High-Speed Sync (FP Flash)
~H20DD
c'G •
5
Check that the
~ H
icon is displayed
in the viewfinder, then take the
picture.
The image was removed due
to copyright restrictioos
The image was removed due
to copyright restrictions
1jI"
With normal flash. With high-speed sync.
With high-spe&d sync. the Gukle No. changes depending on the shutter spe&d (see
page 121). The laster lhe shutter speed. the shorter the flash range will
be.
Check Ihe
current flash range on the 550EX's LCD panel.
To cancel high·spe&d sync. press the <
+
> and < - > buttons simuRanlKlusty twice
so tllat the II icon OIl the LCD panel turns ott.
Whlln high·speed sync
is
used
in
the manuaillash mode. the 1Iash output ranges Irom
III to 11128.
:/7{:
II
you use l ill flash in the Av mode with high·speed sync, you can
USII
a faster sym::
-'t'-
speed than the normal X·sync spe&d .
33