Olympus STF-22 twin flash with FC-1 controller a complete set. Used on the micro four thirds.

The Olympus STF-22 Twin Flash Set is a set consisting of the TF-22 twin flash, the SR-1 shoe ring, the FC-1 macro flash controller and FR-2 flash adapter ring . This kit allows for precise and exact lighting control when shooting macro work. Flashes can be positioned at any desired angle to provide the best illumination of the subject when texture and detail are needed. Can be fired as a single or dual flash unit. When fired together, left/right balance can be precisely controlled. The SR-1 Shoe Ring 1 (which is needed to use the twin flashes) is only specified to work with Olympus’ 30mm and 60mm macro lenses.
In addition, with the use of the optional FR-1 adapter, this flash system can be used with the Zuiko Digital 50mm f/2.0 and 35mm f/2.0 macro lenses.
Flash ratios can be adjusted in 1/3 EV steps, from 1:8 to 8:1, left to right.
Or only one flash can be used.
Offers TTL auto flash and manual flash capability when used with the FC-1 macro flash controller.
TTL AUTO (GN 0.7-11 control with 1/8EV step)
Manual (GN 0.7-11 control with 1/3EV step)