
Flash-to-subject  distance
ISO Film | Wide | Tele | 
Speed | (24 mm) | (60 mm) | 
50  | 2 to 10 ft  | 2 to 7 ft  | 
  | (0.6 to 3.0 m)  | (0.6 to 2.1 m)  | 
100  | 2 to 14 ft  | 2 to 10 ft  | 
  | (0.6 to 4.3 m)  | (0.6 to 3.0 m)  | 
200  | 2 to 20 ft  | 2 to 14 ft  | 
  | (0.6 to 6.1 m)  | (0.6 to 4.3 m)  | 
400  | 2 to 29 ft  | 2 to 20 ft  | 
  | (0.6 to 8.8 m)  | (0.6 to 6.1 m)  | 
800  | 2 to 41 ft  | 2 to 28 ft  | 
  | (0.6 to 12.5 m)  | (0.6 to 8.5 m)  | 
1600  | 2 to 57 ft  | 2 to 39 ft  | 
  | (0.6 to 17.4 m)  | (0.6 to 11.9 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 movement  | 
  | •  | Beyond the  | 
  | 
  | flash range  | 
  | 
  | 
  | 
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