Canon Speedlite 580EX II Instruction Manual page 13

E=llL II and E - T n Autoflash in the Shooting Modes
4
he background is dark like a night scene, a slow sync speed will be used
to obtain a standard exposure of both the maln subject and background.
Standard exposure of the main subject is obtained with the flash, while a
standard exposure of the background is obtained with a slow shutter speed.
will be used for low-light scenes, using a
If you use the
cDEP>
or
<A-DEP>
shooting mode, the result will be the same as
us~ng the
<P>
(Program AE) mode.
Flash Sync Speeds and Apertures Used
Shutter Speed Setting
1
P
I
Set automatically (1160 sec.
-
1/X sec.)
1
Automatic
I
M I
Set manually (bulb, 30 sec.
-
1IX sec.)
I
Manual
I
lb
1
Set manually (30 sec.
-
1IX sec.)
1/X sec. Is the camera's maximum flash sync speed.
Automatic
Av
I
Set automaticallv 130 sec.
-
1/X sec.)
1
Manual