Canon TS-E 17mm f/4L UD Aspherical Ultra Wide Tilt-Shift Lens for Canon Digital SLR Cameras Tilt and shift lens compatible with all Canon EOS cameras; ultra wide 17mm focal length High-precision lens elements for low distortion and high resolution; +/- 6.5 degrees Tilt and +/-12mm Shift Aspherical and UD lens elements minimize chromatic aberration Circular aperture for creative, blurred highlights Floating internal focus mechanism delivers high-image quality throughout focus range