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Flash Photography 26 Forward and Back
Parallax Correcting Dial
 When a falsh unit is used for photographing, connect the synchro cord to the synchro socket (2).

When using an electronic flash unit, set the M-X synchro selector (3) on X to synchronize all shutter speeds.

When using M-class flash bulbs, set the M-X synchro selector (3) on M to synchronize flash at all shutter speeds. This M-X synchro selector can be switched even after cocking the shutter.

When photographing without flash, keep the M-X synchro selector on X.
Flash Synchronization Table
Contact Type of Flash Shutter Speed
B 1 1/2 1/4 1/8 1/15 1/30 1/60 1/125 1/250 1/500
M M class o o o o o o o o o o o
X Electronic Flash o o o o o o o o o o o
M class o o o o o o o x x x x
      Combinations with the o mark synchronize.
    Combinations with the x mark do not synchronize.
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