Hi Roberto,
The only correct position is 'X' for electronic flashes. The 'FP' is the
setting when photographers used those old flashbulbs. It's due to the timing,
if
I recall correctly. If you set your camera to "FP", the shutter opening isn't
timed correctly. The flash bulbs fired for a longer time and took longer to
get up to maximum light output. An electronic flash fires for something like
1/10,000 to 1/40,000 of a second. Very fast.
George S.
ciock@xxxxxx writes:
> I imagine this for most is a silly question, not for a user of my level
> and with no detailed instruction about my new-used OM-1.
> I discovered that witn an electronic flash mounted on hot shoe 1 of my
> OM-1 the flash light shots, regardeless of the position of the FP-X
> switch.
> On the contrary exposure of film is correct on X position, totally under
> exposed when on FP position.
> My question is which is the tecnical reason for this to happen. Thanks,
> Roberto.
>
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