The Tokina AT-X 16-28mm F2.8 Pro FX is a wide-angle lens made for the large sensor fullframe camera and to rival the superb Nikon 14-24mm f/2.8G ED AF-S NIKKOR and the Canon EF 16-35mm f/2.8L II USM as a third-party lens that gives more bang for the buck. Lets find out.