Canon TS-E 17mm f/4L

The Canon TS-E 17mm F4L is an ultra-wide angle tilt and shift lens for Canon's full-frame and APS-C Digital SLRs. This lens differs from earlier Canon TS-E optics by featuring a new barrel design that allows the directions of the tilt and shift to be rotated independently of each other, offering a high degree of control over the positioning of the focal plane. It also features Canon's latest sub-wavelength structure coating (SWC) for the minimization of flare and ghosting, high-precision aspherical front elements to keep distortion to a minimum and multiple UD elements to reduce chromatic aberration. When used on the 35mm full-frame format, the TS-E 17mm F4L offers the widest angle of view of any similar lens currently available.