>It's the moniker that Olympus gave the flash system which can 'sync at
>any shutter speed'.
To be more precise, FP stands for 'Focal Plane', indicating the curtain
type of shutter OM cameras use. Note that this abbreviation is not only
used on the F280 with OM3Ti/OM4Ti/OM707, but also on the flash sync
switch that surrounds the external flash connector on the OM1(n) and
OM2(n). But this FP switch position was intended for long burning FP
flash bulbs, now obsolete, but that served the same purpose as the
F280's Super FP flash mode: synchronizing from 1/30 to 1/1000 sec to be
used as fill-in. Like the F280 flash, these bulbs were fired when the
first curtain starts to open; when you set the switch in its FP
position but use electronic flash instead the flash is not synchronized
and has no effect.
Hans
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