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Canon 580EX II User Manual

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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.
Maximum Stroboscopic Flashes
Hz
Flash Output
1
2
3
4
5
6 - 7
8 - 9
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
Hz
Flash Output
10
11
12 - 14 15 - 19 20 - 50 60 - 199
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
Flash Output
1/4
1/8
1/16
1/32
1/64
1/128
Flash Count
2
4
8
12
20
40
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.
 
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.
A65_02.fm  Page 25  Thursday, November 23, 2006  1:27 PM
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