The Canon TS-E 17mm f/4L is a professional-grade ultra-wide angle tilt-shift lens designed for architectural photography and landscape work. This EF-mount lens offers independent tilt and shift control with up to +/-6.5 degrees of tilt and +/-12mm of shift, both rotatable through +/-90 degrees for maximum compositional flexibility. Built with Canon's L-series construction, it features weather and dust seals, four UD (ultra-low dispersion) glass elements to minimise chromatic aberration, and a sub-wavelength coating for outstanding glare and flare control. The 104-degree diagonal field of view makes it the widest tilt-shift lens in Canon's lineup, ideal for capturing architectural interiors, landscapes, and applications requiring precise perspective control without autofocus capability.