Yes!! Words you never want to hear but my backpack sling wasnt closed when I threw it over my shouder and out came my camera with lens on it. So after that I have had problms with it focusing or it will continue to say busy. I took it o a shop around town the guy eyed the camera and lens said they were perfect nothing wrong with them so as Im taking some photos today it did it again and it wants to wait like a minute before taking another picture cuz its BUSY. Question has anyone had this problem? Is it the lens or is it the camera? I use a Rebel xsi. Any help greatly appreciated.