Canon Speedlite 580EX II Instruction Manual page 19

Bounce Flash
1
By pointing the flash head toward a wall or ceiling, the flash will bounce
off the surface before illuminating the subject. This can soften shadows
behind the subject for a more natural-looking shot. This is called bounce
flash.
Set the Bounce Direction
Hold down the
<PUSH>
button and turn the flash head.
If the flash coverage is set automatically, the flash coverage will be fixed
to 50mm.
The LCD panel will also display <
-
-
>
mm.
a You can also set the flash coverage manually.
-r
r
,py.
' -
sz$q+--r-
-
-
b
a Ifthe wall or wiling is
too
far a = o u ~ ~ a b h m i i h
6 6 % % % k
and
regult
in
underrucposure.
a The
wail
or miling should be a plain, white color for high reflectance. If
fhe bounmsurfEKse is not whRe, a
color
cast may result
in the picture.
a AReF Vou take fieshot, if the flash exposure mtnimation lamp does not