you're looking at A tokina atx-pro sd wide angle 11-16 f2.8 (if) manual focus lens for Nikon crop sensor dx cameras. great for real estate photography which is what I used it for until I changed to a Nikon 14-24mm . lens has has been sitting on my shelf for the last few years. It comes with a generic bottom cap because the original one has been lost since I had the lens but retains the original tokina front lens cap