Sigma 12-24mm f/4.5-5.6 EX Aspherical DG Autofocus Lens for Pentax AF Type: Wide Angle Zoom Lenses Focus Type: Auto Focus Compatibility: For Pentax Features: Super Multi Coating reduces flare and ghosting that tends to occur when using digital SLR cameras. When used with a 35mm or full-frame digital SLR camera, this ultra wide angle zoom lens offers 122 degree super wide angle of view along the diagonal axis. Optimized for Digital SLR Cameras HSM (Hyper