The new Tokina AT-X 17-35mm f/4 Pro FX full-frame wide zoom is now on sale in the United Kingdom. Available in Canon and Nikon fit, the Tokina AT-X 17-35mm f/4 Pro FX has an optical formula that comprises 13 elements arranged in 12 groups, and comes with a nine-bladed iris diaphragm. Notable features include an angle-of-view range of 103.96° -64.74°, a rubber seal around the lens mount, and Tokina’s exclusive one-tocuh focus clutch mechanism that allows the photographer to switch between AF and MF simply by snapping the focus ring forward for AF and back toward the camera to focus manually. Both the Canon and the Nikon versions come with a silent, high-precision AF motor. The Tokina AT-X 17-35mm f/4 Pro FX lens is available from Kenro for £829.99.