I recently purchased the STF-8 twin macro light set. It is easy to attach to the M.Zuiko 60 mm f/2.8 macro lens only taking a minute or two. Thus far I've only used the STF-8 in TTL mode. The results have been very good. It is easy to move the flash heads around the mounting ring and adjust the shooting angle of the individual heads. I may investigate using some very small flash ball heads with the STF-8 to move them further away from the subjects to see if I can get even better light distribution. The STF-8 even works very well with extension tubes for even more magnification effect. If you enjoy hand-held macro photography the STF-8 twin macro light kit will dramatically extend your image possibilities. They are pricey, but you get what you pay for. I like the fact that they are weatherproof as one of my favourite subjects are flowers in a light rain.