has anyone had both and was there much difference in the 2,i have a f4 is and i like it but the noisy is really bugs me,sounds cheap to me,theres a 2.8 m1 is for about the same price as i could get for my f4,a bit more,i tried the m2 version at my local cam shop and it was silent,i don't know why the f4 is so noisy,


