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The operating range of the film (flash distance) will vary depending upon the film’s sensitivity (ISO speed). When using flash,
keep your subject within the range of the effective flash illumination as indicated in the chart below.
Effective flash range
Film speed Wide angle Telephoto
(38 mm) (115 mm)
ISO 100
0.9 – 3.0 m 0.9 – 2.1 m
3.0 – 9.8 ft. 3.0 – 6.9 ft.
ISO 400
0.9 – 6.0 m 0.9 – 4.2 m
3.0 – 19.7 ft. 3.0 – 13.8 ft.
ISO 800
0.9 – 8.5 m 0.9 – 5.9 m
3.0 – 27.9 ft. 3.0 – 19.4 ft.
ISO 1600
0.9 – 12.0 m 0.9 – 8.4 m
3.0 – 39.4 ft. 3.0 – 27.6 ft.
(Using color negative film)