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AF160FC.book Page 33 Wednesday, February 11, 2009 3:38 PM
Manual flash guidelines and calculation methods
Subject distance guideline
Unit: m
ISO
mode
GN
FULL
16.0
100
1/4
8.0
1/16
4.0
FULL
22.6
200
1/4
11.3
1/16
5.7
FULL
32.0
400
1/4
16.0
1/16
8.0
FULL
45.3
800
1/4
22.6
1/16
11.3
FULL
64.0
1600
1/4
32.0
1/16
16.0
FULL
90.5
3200
1/4
45.3
1/16
22.6
FULL
128.0
6400
1/4
64.0
1/16
32.0
How to use the flash guidelines
You can determine the distance from the ISO sensitivity, the flash mode dial setting (FULL, 1/4, 1/16), and the aperture settings.
Example: If the ISO sensitivity = 200, the mode dial setting = 1/4, and the aperture = F11, then the distance is about 1.0 m. (Exposure = 1x)
You can also determine a combination of aperture, mode dial setting, and ISO sensitivity by figuring backwards from the distance.
* The values in the guideline are for 1x exposure. The exposure for taking photos varies depending on the subject and shooting conditions. We recommend taking test
shots to check the exposure for the shot. (Try opening the aperture and increasing the exposure.)
F2.8
F4
F5.6
5.7
4.0
2.8
2.8
2.0
1.4
1.4
1.0
0.71
8.0
5.7
4.0
4.0
2.8
2.0
2.0
1.4
1.0
11
8.0
5.7
5.7
4.0
2.8
2.8
2.0
1.4
16
11
8.0
8.0
5.7
4.0
4.0
2.8
2.0
23
16
11
11
8.0
5.7
5.7
4.0
2.8
32
23
16
16
11
8.0
8.0
5.7
4.0
45
32
23
23
16
11
11
8.0
5.7
F8
F11
F16
2.0
1.4
1.0
1.0
0.71
0.50
0.50
0.35
0.25
2.8
2.0
1.4
1.4
1.0
0.71
0.71
0.50
0.35
4.0
2.8
2.0
2.0
1.4
1.0
1.0
0.71
0.50
5.7
4.0
2.8
2.8
2.0
1.4
1.4
1.0
0.71
8.0
5.7
4.0
4.0
2.8
2.0
2.0
1.4
1.0
11
8.0
5.7
5.7
4.0
2.8
2.8
2.0
1.4
16
11
8.0
8.0
5.7
4.0
4.0
2.8
2.0
F22
F32
F45
0.71
0.50
0.35
0.35
0.25
0.18
0.18
0.13
0.09
1.0
0.71
0.50
0.50
0.35
0.25
0.25
0.18
0.13
1.4
1.0
0.71
0.71
0.50
0.35
0.35
0.25
0.18
2.0
1.4
1.0
1.0
0.71
0.50
0.50
0.35
0.25
2.8
2.0
1.4
1.4
1.0
0.71
0.71
0.50
0.35
4.0
2.8
2.0
2.0
1.4
1.0
1.0
0.71
0.50
5.7
4.0
2.8
2.8
2.0
1.4
1.4
1.0
0.71
33
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