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Subject distance guideline
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.)
Manual flash guidelines and calculation methods
Unit: m
ISO mode GN F2.8 F4 F5.6 F8 F11 F16 F22 F32 F45
100
FULL 16.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71 0.50 0.35
1/4 8.0 2.8 2.0 1.4 1.0 0.71 0.50 0.35 0.25 0.18
1/16 4.0 1.4 1.0 0.71 0.50 0.35 0.25 0.18 0.13 0.09
200
FULL 22.6 8.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71 0.50
1/4 11.3 4.0 2.8 2.0 1.4 1.0 0.71 0.50 0.35 0.25
1/16 5.7 2.0 1.4 1.0 0.71 0.50 0.35 0.25 0.18 0.13
400
FULL 32.0 11 8.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71
1/4 16.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71 0.50 0.35
1/16 8.0 2.8 2.0 1.4 1.0 0.71 0.50 0.35 0.25 0.18
800
FULL 45.3 16 11 8.0 5.7 4.0 2.8 2.0 1.4 1.0
1/4 22.6 8.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71 0.50
1/16 11.3 4.0 2.8 2.0 1.4 1.0 0.71 0.50 0.35 0.25
1600
FULL 64.0 23 16 11 8.0 5.7 4.0 2.8 2.0 1.4
1/4 32.0 11 8.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71
1/16 16.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71 0.50 0.35
3200
FULL 90.5 32 23 16 11 8.0 5.7 4.0 2.8 2.0
1/4 45.3 16 11 8.0 5.7 4.0 2.8 2.0 1.4 1.0
1/16 22.6 8.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71 0.50
6400
FULL 128.0 45 32 23 16 11 8.0 5.7 4.0 2.8
1/4 64.0 23 16 11 8.0 5.7 4.0 2.8 2.0 1.4
1/16 32.0 11 8.0 5.7 4.0 2.8 2.0 1.4 1.0 0.71
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AF160FC.book Page 33 Monday, November 17, 2008 10:43 AM