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H-18
H
Tips on Speedlight Care and Reference Information
ISO sensitivity
50 100 200 400 800 1600 3200 6400 12800
Aperture (f)
1.4
3.7 –
39.3
5 –
55.4
7.3 –
65.6
9.9 –
65.6
14.2 –
65.6
19.7 –
65.6
27.9 –
65.6
39.4 –
65.6
55.8 –
65.6
Effective flash output distance range (ft)
2
2.7 –
27.5
3.7 –
39.3
5 –
55.4
7.3 –
65.6
9.9 –
65.6
14.2 –
65.6
19.7 –
65.6
27.9 –
65.6
39.4 –
65.6
2.8
2 –
19.6
2.7 –
27.5
3.7 –
39.3
5 –
55.4
7.3 –
65.6
9.9 –
65.6
14.2 –
65.6
19.7 –
65.6
27.9 –
65.6
4
2 –
13.7
2 –
19.6
2.7 –
27.5
3.7 –
39.3
5 –
55.4
7.3 –
65.6
9.9 –
65.6
14.2 –
65.6
19.7 –
65.6
5.6
2 –
9.8
2 –
13.7
2 –
19.6
2.7 –
27.5
3.7 –
39.3
5 –
55.4
7.3 –
65.6
9.9 –
65.6
14.2 –
65.6
8
2 –
6.8
2 –
9.8
2 –
13.7
2 –
19.6
2.7 –
27.5
3.7 –
39.3
5 –
55.4
7.3 –
65.6
9.9 –
65.6
11
2 –
4.9
2 –
6.8
2 –
9.8
2 –
13.7
2 –
19.6
2.7 –
27.5
3.7 –
39.3
5 –
55.4
7.3 –
65.6
16
2 –
3.2
2 –
4.9
2 –
6.8
2 –
9.8
2 –
13.7
2 –
19.3
2.7 –
27.5
3.7 –
39.3
5 –
55.4
22
2 –
2.2
2 –
3.2
2 –
4.9
2 –
6.8
2 –
9.8
2 –
13.7
2 –
19.3
2.7 –
27.5
3.7 –
39.3
32
—
2 –
2.2
2 –
3.2
2 –
4.9
2 –
6.8
2 –
9.8
2 –
13.7
2 –
19.3
2.7 –
27.5
45
——
2 –
2.2
2 –
3.2
2 –
4.9
2 –
6.8
2 –
9.8
2 –
13.7
2 –
19.3
64
———
2 –
2.2
2 –
3.2
2 –
4.9
2 –
6.8
2 –
9.8
2 –
13.7