Flash-to-subject distance
ISO Film | Wide | Tele |
Speed | (25 mm) | (50 mm) |
50 | 2 to 11 ft | 2 to 6 ft |
| (0.6 to 3.4 m) | (0.6 to 1.8 m) |
100 | 2 to 15 ft | 2 to 8 ft |
| (0.6 to 4.6 m) | (0.6 to 2.4 m) |
200 | 2 to 21 ft | 2 to 11 ft |
| (0.6 to 6.4 m) | (0.6 to 3.4 m) |
400 | 2 to 30 ft | 2 to 16 ft |
| (0.6 to 9.1 m) | (0.6 to 4.9 m) |
800 | 2 to 42 ft | 2 to 22 ft |
| (0.6 to 12.8 m) | (0.6 to 6.7 m) |
1600 | 2 to 59 ft | 2 to 31 ft |
| (0.6 to 18 m) | (0.6 to 9.4 m) |
Flash/warning-lamp signals
Lamp Indicator | Situation |
Glows green | • Camera ready for |
| |
Glows red | • Subject between |
| 8 in. (20 cm) and |
| 2 ft (0.6 m) from |
| camera. Shutter |
| button locks. |
“Blinks” red | • Flash not |
| fully charged |
| • Camera shake |
| warning |
| • Beyond the |
| flash range |
|
|
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