Quote Originally Posted by Jon Ruyle


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.


According to this article, MTF paragraph, other variablesthan production samples would belens aperture and object distance. Interesting stuff.