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, and the FC-1 macro flash controller. 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’ 11-22mm, 14-54mm, and 50-200mm lenses.  It does not affix to the filter threads, and as such it is highly unlikely that you would be able to use a lens from another manufacturer unless you use stepping rings from other manufactures.

In addition, with the use of the optional FR-2 adapter, this flash system can be used with the Olympus M.Zuiko Digital ED 60mm F2.8 macro lens. This set can be used with TTL on the Micro Four Thirds system also.

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)