I read in another thread: First Shot With New EF 70-200 F4 L Lens (by Linco22 Feb 19 2006 in Aviation Photography) that "The f4 is nice across the range, its sharp enough wide open. Focus is miles ahead of the 100-300 and the sharpness and contrast straight out of the camera are in a league of their own..." from Linco22.
Does the "mm" indicates the distance I got whith such lens?
In another word, a 75/300 has a better [longer] range than the 200?
Thanks a lot.