First, see this:-http://www.youtube.com/watch?v=Ewcgq9tmPfwThen, this comparison (on the AF motoring speed alone):-http://www.youtube.com/watch?v=n1ap2OjrfVQhttp://www.youtube.com/watch?v=2Jdcpsf1QasWell, this time, I blog, YOU decide! (I just don't make any comments!)Read Also:-AF Speed Difference of K-m Vs K20D