The olympus FL-50R Flash is a fully-featured and powerful shoe mount flash
that also offers wireless flash operation. Control is possible directly from
the camera without the need for cables. This flash unit is the ideal
accompaniment to the olympus E-3, which features a newly-developed RC Data
Transfer System that transmits data optically. This significantly reduces the
power consumption of the built-in flash when being used as the system
commander. Flash control is available in three groups, allowing flash mode and
compensation settings to be set independently for each group - thus enabling
ultra-precise illumination. Four remote control communication channels can be
set by the user to avoid interference with other peripherals in the vicinity.