High-speed sync guide no. table – Canon 380EX User Manual
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II. Speedlile 380EX with Type-A Cameras
A
Check that nothing is blinking in the
^ viewfinder and press the shutter
button completely to take the
picture.
♦ When high-speed sync has been set, V
h
is displayed in the viewfinder
Taken with FP flash at 1/3000 sec., f/2.0
(EF 100mm f/2 0 lens).
Taken with normal flash at 1/125 sec., f/9.5
(EF 100mm 1/2 0 lens)
0
The Speedlite's Guide No. changes according to the high-speed sync. The
Speediite's flash range decreases with FP flash.
High-Speed Sync Guide No. Table
-^overage angle(mm)
Shutter speed
24
28
35
50
70
105
1/180
11.2
12.3
15.0
16.6
17.6
20.3
1/250
10.0
11.0
13.3
14.8
15.7
18.1
1/350
8.7
9.6
11.6
12.9
13.7
15.8
1/500
7.3
8.0
9.8
10,8
11.5
13.3
1/750
6.2
6.8
8.2
9.1
9.7
11.2
1/1000
5.2
5.7
6.9
7.7
8.2
9.4
1/1500
4.4
4.8
5.8
6,4
6.9
7.9
1/2000
3.7
4.0
4.9
5.4
5.8
6.6
1/3000
3.1
3.4
4.1
4.6
4.8
5.6
1/4000
2.6
2.8
3.5
3-8
4.1
4.7
The effective range of FP flash is 0,7 to 11.9 meters / 2.3 to 39 3 teet (at 1/180 sec. with EF
50mm f/1.4 lens).
'rt' Guide No. can be calculated with the following formula; Camera-fo-subject
T'jJi'T distance x correct aperture value = Guide No,
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