Flash Shooting Distance Range For The Built-In Speedlight - Kodak DCS Pro SLR/n User Manual

Flash Shooting Distance
Range for the Built-in
Speedlight
April 29, 2004
The flash shooting distance range varies, depending on ISO and aperture.
ISO 200 400
Guide number 17
Aperture value
2.8
5.6
11
16
22
You can also calculate the maximum flash shooting distance by dividing
the guide number by the aperture value.
For example, with an aperture of f/2.8 and an ISO of 200, the maximum
flash shooting distance will be 17 / 2.8 = approximately 6 m.
800 1600
24 34 48
2 2.8 4 5.6
4 5.6 8
4 5.6 8 11
8 11 16
8 11 16 22
16 22 32
22 32 —
32 — —
Flash Photography
Flash shooting
distance range (m)
2 - 8.5
1.4 - 6
1 - 4.2
0.7 - 3
0.6 - 2.1
0.6 - 1.5
0.6 - 1.1
0.6 - 0.8
10-5