I have been trying to figure this out as in some places I read that TTL reads the camera settings for Aperture and Shutter etc which of course a manual lens wont give that aperture reading. But then in other places I read it just "sees" through the lens so it still works with manual lenses. Basically I want to get a better flash than the built in one to get rid, hopefully, of dark areas on the face when taking pictures outside. I am trying to find a very portable reflector too to help with that but havent found one that sits low on the ground with its own simple stand so I dont need someone else helping me. I feel that after getting many lenses, a flash is where I must focus now since after all, its all about the light..or so they say So I thought about the F20M even though the 43 looks so much more advanced...but expensive. Thanks!