12
Flash-to-Subject Distance
ISO Film Speed
Wide (30 mm)
Tele (60 mm)
50
2 to 14 ft
2 to 7 ft
(0.60 to 4.3 m)
(0.60 to 2.1 m)
100
2 to 19 ft
2 to 10 ft
(0.60 to 5.8 m)
(0.60 to 3.1 m)
200
2 to 27 ft
2 to 14 ft
(0.60 to 8.2 m)
(0.60 to 4.3 m)
400
2 to 38 ft
2 to 19 ft
(0.60 to 11.6 m)
(0.60 to 5.8 m)
800
2 to 53 ft
2 to 27 ft
(0.60 to 16.2 m)
(0.60 to 8.2 m)
1600
2 to 74 ft
2 to 38 ft
(0.60 to 22.6 m)
(0.60 to 11.6 m)