Title: Disappointment
Review: When this lens first arrived, I was more than pleased with the results. Even with a fixed focal length it became my go to lens for almost every situation. Within a few weeks of arrival I shot an entire session using f/1.8, and every image came out clear and crisp. After taking only a few thousand pictures over about 2 months, the quality quickly started to deteriorate. Now I am completely unable to focus (in auto or manual) under around f/2.8 or so, and even higher for subjects more than a few feet away. I'm hoping I just got a lemon, but i've seen other reviews showing this problem, although after more use. Will be sending to Canon, hopefully they can repair the problem.
Is this product review negative?