Shutter speed |
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| 16* | 24 | 28 | 35 | 50 | 70 | 105 |
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1/250 | 4.7 | 9.7 | 10.0 | 10.9 | 13.4 | 15.0 | 16.4 |
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1/500 | 3.3 | 6.8 | 7.1 | 7.7 | 9.5 | 10.6 | 11.6 |
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1/1000 | 2.4 | 4.8 | 5.0 | 5.5 | 6.7 | 7.5 | 8.2 |
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1/2000 | 1.7 | 3.4 | 3.5 | 3.9 | 4.7 | 5.3 | 5.8 |
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1/4000 | 1.2 | 2.4 | 2.5 | 2.7 | 3.4 | 3.8 | 4.1 |
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1/8000 | 0.8 | 1.7 | 1.8 | 1.9 | 2.4 | 2.7 | 2.9 |
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1/12000 | 0.6 | 1.2 | 1.3 | 1.4 | 1.7 | 1.9 | 2.1 |
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* When the wide panel is attached.
ISO speed coefficient
ISO100 | ISO200 | ISO400 | ISO800 | ISO1600 | ISO3200 |
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1 | 1.4 | 2 | 2.8 | 4 | 5.7 |
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Photography distance range = Guide number × ISO speed coefficient ÷ Aperture
Ex) When using an
length: 28 mm, aperture: F2.8, ISO: 400
9.5(Guide number) × 2 (ISO speed coefficient) ÷ 2.8 (Aperture) = 6.5 m The flash light reaches to 6.5 m.
Information Additional