I bought an Olympus FL-36 second hand last year. I haven't used it a ton, but I feel like either I'm not using it properly, or it's not working properly with my camera. I have a GH2, and I swear the TTL function doesn't work. My understanding is that that should fire a test flash and meter through the lens on the camera, yielding a more or less properly exposed photo. I just spent the night photographing an indoor fair at my kid's school tonight and it seemed like I had to more or less manually adjust it for every shot. For starters, I had it on TTL Auto all night, four thirds mode, and every shot required anywhere from +1.3 to +3.0 stops of adjustment on the flash. I was aiming it generally at a diagonal to the ceiling, but I thought that shouldn't matter as the TTL should meter whatever it sees. Furthermore, at one point I decided to drop the ISO from 1600 to 800, and the pictures got much darker, I had to compensate a full stop on the flash. That led me to believe the TTL wasn't working at all?? Am I missing something here? I've certainly gotten good flash pics with it, but it always seems to take 2-3 shots with adjustments of the output to get 1 good shot. Thanks as always for any advice!