Quote Originally Posted by neuroanatomist View Post
. In practice, there is a difference in this case - the 18-200mm lens doesn't really deliver 200mm at the long end; I tested one a while back, and it was more like ~160mm at the long end when compared to the same shot taken with the 70-200mm f/2.8L IS II.
That one is odd. I think I would go back and check the testing methods. Canon could owe allot of people money for false advertising, I wonder what 40mm would be worth in a class action lawsuit