Sigma twelve-24mm f/four.five-five.6 EX DG IF HSM Aspherical Ultra Vast Angle Zoom Lens for Canon SLR Cameras. Ultra extensive angle zoom lens gives you 122 diploma watch alongside the diagonal axis. twelve-24mm focal duration. f4.five-five.six maximum aperture. Super Multi Coating lessens flare and ghosting. My websites: Sigma 12-24mm Aspherical Ultra Wide Angle Zoom Lens for Canon SLR Cameras