I am very much an amateur who got a D5200 last summer as a gift. I just bought a Nikkor ED 80-400mm f/4.5-5.6D AF VR lens from a reputable ebay dealer, but I cannot get the autofocus to work. The lens is set on autofocus lock, and the autofocus works on my camera with the other lenses that came with it. Have I bought the wrong lens, or what am I doing wrong? Thanks for any help!