Sigma twelve-24mm f/four.5-five.6 EX DG IF HSM Aspherical Ultra Broad Angle Zoom Lens for Canon SLR Cameras. Ultra large angle zoom lens delivers 122 diploma watch alongside the diagonal axis. 12-24mm focal duration. f4.five-five.6 maximum aperture. Super Multi Coating cuts down flare and ghosting. My websites: Sigma 12-24mm Aspherical Ultra Wide Angle Zoom Lens for Canon SLR Cameras