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Additional Information
51
GB
APS-C format (ISO100)
ISO speed coefficient
Photography distance range = Guide number × ISO speed coefficient
÷ Aperture
Ex) When using an APS-C format camera, shutter speed: 1/500 second, focal
length: 28 mm, aperture: F2.8, ISO: 400
7.1 (Guide number) × 2 (ISO speed coefficient) ÷ 2.8 (Aperture) = 5 m
The flash light reaches to 5 m.
Shutter speed
Flash Coverage Settings (mm)
16* 24 28 35 50 70 105
1/250 4.7 9.7 10.0 10.9 13.4 15.0 16.4
1/500 3.3 6.8 7.1 7.7 9.5 10.6 11.6
1/1000 2.4 4.8 5.0 5.5 6.7 7.5 8.2
1/2000 1.7 3.4 3.5 3.9 4.7 5.3 5.8
1/4000 1.2 2.4 2.5 2.7 3.4 3.8 4.1
1/8000 0.8 1.7 1.8 1.9 2.4 2.7 2.9
1/12000 0.6 1.2 1.3 1.4 1.7 1.9 2.1
* When the wide panel is attached.
ISO100 ISO200 ISO400 ISO800 ISO1600 ISO3200
11.422.845.7
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