Amazon.com : Canon TS-E 17mm f/4L UD Aspherical Ultra Wide Tilt-Shift Lens for Canon Digital SLR Cameras Black : Digital Slr Camera Lenses : Electronics
Canon TS-E 17mm f4L with Canon 1.4x extender vs. Canon TS-E 24mm f3.5L | DigiDaan
Amazon.com : Canon TS-E 17mm f/4L UD Aspherical Ultra Wide Tilt-Shift Lens for Canon Digital SLR Cameras Black : Digital Slr Camera Lenses : Electronics