About Canon 17mm F/4L
The Canon TS-E 17mm f/4L lens expands shooting possibilities exponentially on EOS Digital cameras. Designed with UD glass to minimize and compensate for chromatic aberrations, with specially coated aspherical elements for the highest possible glare-free image quality, this tilt-shift lens offers an angle of view of 93 Degree. New TS revolving lets users freely combine tilting and shifting within the range of +/- 90 Degree in the direction of movement.
The lens also has an improved tilt & shift knob with an enhanced range of movement of up to +/- 6.5 Degree and revolving lenses for better operability, it uses a circular aperture for beautiful out-of-focus areas and has an SWC lens coating to control ghosting and flare to a far greater degree than with earlier coating technologies.