The Tokina AT-X 116 PRO DX AF 11-16mm f/2.8 Lens provides an ultra-wide angle and a fast aperture for better photography in low-light situations. Many photojournalists consider having an f/2.8 aperture a must for any lens in their camera bag. Based on the outstanding optical design of the AT-X 124 PRO DX (12-24mm f/4) lens, the AT-X 116 PRO DX has a slightly shorter zoom range to maintain optical quality at wide apertures.