I'd like to start playing with external flash on/off my GH2. Of course, this means I have to get a flash, but at the same time I'm not an expert. Right now I'm eyeing the Metz 50. I'd like to hear suggestions about which external flash(es) you've used with the GH2 (specifically!) and what works/doesn't work. For example: TTL metering high-speed sync optical slave wireless triggering Thanks! The various flash specs I've look at are disappointingly vague (x,y,z features supported only on certain bodies). Edit: as an addendum, could any of these flashes work for water drop photography?