Olympus FL-20
The FL-20 is small and dedicated only to the Olympus E-system cameras....
Olympus
Olympus STF-22
Olympus's twin flash uses the same FC-1 controller as the ring flash, but offers more control options........
Olympus SRF-11
With a GN of 11m @ ISO 100, the Olympus ring flash is compatible with the Zuiko 14-54mm and 50-200mm...