I have this very small Olympus FL-20 electronic flash which I would like to use as a fill flash on my M8. It easily slips into a shirt pocket, has TTL Auto, Auto and Manual modes and was first made for their Camedia series cameras. I am somewhat hesitant to try it however because I know nothing about compatible trip voltages etc. Anyone know of a list of compatible flash units for the M8? Where would one go to find out about trip voltages for different cameras and flash units? Any information would be appreciated. Paul