so a few days ago i dropped my 18-135 cannon lens (yup, bed). I was pretty sure the lens need repair, because it wouldn't AF. MF is working. However I tried using the lens on an another camera and it works fine (AF+MF). Then i thought the camera is broken, but tried a 18-55 lens and it is working perfectly. Don't know what to do. Any help is appreciated. The two cameras are EOS 700D and EOS 600D.