High-speed sync guide number table, Speedllte 220ex accessories /reference – Canon 220EX User Manual
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Speedllte
220EX
Accessories
/Reference
Specifications
High-Speed Sync Guide Number Table
Shutter Speed
Guide Number (m/ft)
ISO 100
ISO 200
ISO 400
1/125
13.3/43,6
18,8/61 7
26 6/87.2
1/180
12/39.4
17/55.8
24/78.7
1/250
10.7/35 1
15 1/49.5
21.4/70.2
1/350
9.1/30
12.9/42.3
18.2/59.7
1/500
7,7/25 3
10.9/35
8
15.4/50.5
1/750
6
5/21.3
9.2/30.2
13/42.6
1/1000
5.4/17.7
7.6/24.9
10 8/35 4
1/1500
4.6/15.1
6.5/21.3
9.2/30.2
1/2000
3.8/12.5
5.4/17.7
7.6/24 9
1/3000
3 2/10.5
4.5/14.8
6.4/21
1/4000
2 7/8,9
4/13.1
5.4/17 7
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