Individual samples of lenses seem to vary. For example, compare Bryan's two samples of the 70-200 f/2.8 IS II. At 200mm f/2.8, I think they look pretty different in the corners. I would not be at all surprised if they are at least 200 points apart.
Individual samples of lenses seem to vary. For example, compare Bryan's two samples of the 70-200 f/2.8 IS II. At 200mm f/2.8, I think they look pretty different in the corners. I would not be at all surprised if they are at least 200 points apart.