Distance range guidelines for auto flash photography (Unit: m)
ISO
F2.8
100
0.50 - 5.7
0.35 - 4.0
200
0.71 - 8.0
0.50 - 5.7
400
1.0 - 8.0
0.71 - 8.0
800
1.4 - 8.0
1600
2.0 - 8.0
3200
2.8 - 8.0
6400
4.0 - 8.0
How to read the distance range guidelines
You can determine the distance from the ISO sensitivity and aperture settings.
Example: If the ISO sensitivity = 200, aperture = F11, then the distance range is about 0.18 to 2.0 m.
* The ranges of distance given in the table are guidelines. The range of distances for taking photos varies depending on the subject and shooting conditions. We