Canon SPEEDLITE 580EX II Instruction Manual page 26

-- To avoid overheating and deteriorating the flash head, do not use stroboscopic
flash more than
10
times in succession. After
10
times, allow the Speedlite to
rest for at least 15 min. If you try to use the stroboscopic flash more than 10
times in succession, the firing might stop automatically to protect the flash
head. If this happens, allow the Speedlite to rest for at least
15
min.
aJ
~
Stroboscopic flash is most effective with a highly reflective subject
against a dark background.
(~
Using a tripod, a remote switch, and external power source is recommended.
~, A flash output of 1/1 or 1/2 cannot be set for stroboscopic flash.
~
Stroboscopic flash can be used with "bulb."
~ If the number of flashes is displayed as - -, the firing will continue until the shutter closes or
the battery is exhausted. The number of flashes will be limited as shown by the table below.
Maximum Stroboscopic Flashes
~
1 2 3 4 5
6-7
8-9
Flash Outpu
1/4
7 6 5 4 4 3 3
1/8 14 14 12 10 8 6 5
1/16
30 30 30 20 20
20 10
1/32 60 60 60 50 50 40 30
1/64 90 90 90 80 80 70 60
1/128 100 100 100 100 100 90 80
~
10 11
12 -14 15·19 20 - 50 60 -199
Flash Outpu .
1/4 2 2 2
2 2 2
1/8 4 4 4 4 4
4
1/16 8 8 8 8 8 8
1/32 20 20 20 18
16 12
1/64 50 40 40 35
30 20
1/128 70 70
60 50 40 40
~
If the number of flashes is displayed as - -, the maximum number of flashes will
be as shown by the table below regardless of the firing frequency.
Flash Output 1/4 1/8 1/16
1/32 1/64 1/128
Flash Count
2
4 8
12
20 40
25