Its 8mm starting focal length delivers a 12.8mm equivalent field of view on APS-C Canon bodies, making it one of the widest rectilinear zooms available for the system. The optical design incorporates three aspherical and five ED elements to control distortion, while the bundled accessory kit adds practical value for field work. This lens is best for landscape photographers who need an extreme, uncropped perspective without switching to a fisheye.
