among other debates i am having; i am curious if anyone has switched from the f4 to the 2.8 iii? the f4 is raved about on this and other forums!! i have the 24-70ii but having shot (on the 5d4) entirely since i picked it up i am shooting (mostly portraits and landscapes) almost entirely at the 24 or 70 range. this is making me think about either (a) the 24mm canon and 70-200ii or the 16-35 and the 70-200..

