Guide No. (at ISO 100, in meters/feet)
Normal Flash (Full Output) and Quick Flash
Flash Coverage | 14 | 24 | 28 | 35 | 50 | 70 | 80 | 105 | |
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Normal Flash | 15/ | 28/ | 30/ | 36/ | 42/ | 50/ | 53/ | 58/ | |
(Full output) | 49.2 | 91.9 | 98.4 | 118.1 | 137.8 | 164 | 173.9 | 190.3 | |
Quick Flash |
| Same | as 1/2 | to 1/6 | manual | flash | output |
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Manual Flash
Flash Output |
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| Flash Coverage (mm) |
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14 | 24 | 28 | 35 | 50 | 70 | 80 | 105 | ||
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1/1 | 15/ | 28/ | 30/ | 36/ | 42/ | 50/ | 53/ | 58/ | |
49.2 | 91.9 | 98.4 | 118.1 | 137.8 | 164 | 173.9 | 190.3 | ||
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1/2 | 10.6/ | 19.8/ | 21.2/ | 25.5/ | 29.7/ | 35.4/ | 37.5/ | 41/ | |
34.8 | 65 | 69.6 | 83.7 | 97.4 | 116.1 | 123 | 134.5 | ||
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1/4 | 7.5/ | 14/ | 15/ | 18/ | 21/ | 25/ | 26.5/ | 29/ | |
24.6 | 45.9 | 49.2 | 59.1 | 68.9 | 82 | 86.9 | 95.1 | ||
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1/8 | 5.3/ | 9.9/ | 10.6/ | 12.7/ | 14.8/ | 17.7/ | 18.7/ | 20.5/ | |
17.4 | 32.5 | 34.8 | 41.7 | 48.6 | 58.1 | 61.4 | 67.3 | ||
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1/16 | 3.8/ | 7/ | 7.5/ | 9/ | 10.5/ | 12.5/ | 13.3/ | 14.5/ | |
12.5 | 23 | 24.6 | 29.5 | 34.4 | 41 | 43.6 | 47.6 | ||
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1/32 | 2.7/ | 4.9/ | 5.3/ | 6.4/ | 7.4/ | 8.8/ | 9.4/ | 10.3/ | |
8.9 | 16.1 | 17.4 | 21 | 24.3 | 28.9 | 30.8 | 33.8 | ||
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1/64 | 1.9/ | 3.5/ | 3.8/ | 4.5/ | 5.3/ | 6.3/ | 6.6/ | 7.3/ | |
6.2 | 11.5 | 12.5 | 14.8 | 17.4 | 20.7 | 21.7 | 24 | ||
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1/128 | 1.3/ | 2.5/ | 2.7/ | 3.2/ | 3.7/ | 4.4/ | 4.7/ | 5.1/ | |
4.3 | 8.2 | 8.9 | 10.5 | 12.1 | 14.4 | 15.4 | 16.7 | ||
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54