I think my new lens is defective. So far I have not been happy with the results from it. After looking at others pictures taken with this lens and reading about it, something does not seem right. I am using it on a D40, so it is supposed to be using essentially the 'best' part of the lens. Pictures seem blurry, and only focused in one exact spot. Some may say it has to do with the user, but I've gotten many good shots with my 55-200 and have always been satisfied. Attached are some images showing what I am talking about. Thanks for any advice.