Bob Andersson wrote:
Not having had a chance to try out the GF1, which is apparently about as good as contrast based AF gets at the moment, I have no clear idea of what the current shortfall is.
It's my understanding that the title of fastest contrast based AF in an interchangeable lens camera is currently held by the GF1's predecessor, the GH1, which averages around 1/3 of a second (while the GF1 is around 0.1 sec. slower).
As to the other question of phase change vs light loss, given the current lack of fast (affordable) (prime) lenses for the m4/3 format, I personally would prefer to stick with contrast based AF. Especially if phase change would also add to the body size since that's one of the format's distinguishing characteristics.
My 2¢ - Mark