The Canon EF11-24mm f/4L USM employs four aspherical lens elements, including a ground aspherical element that, with an outer diameter of Φ87 mm, boasts the world’s largest diameter among aspherical lenses.^*1 The four aspherical elements make possible the realization of the world’s widest angle of view^*2 starting at a minimum focal length of 11 mm. Enabling new possibilities in ultra-wide-angle visual expression, the new lens covers horizontal and diagonal angles of view of 117 degrees and 126 degrees, respectively, allowing users to capture in a single shot nearly the entire field of view equivalent to that seen by the human eye.

In addition to achieving the world’s widest angle of view, the Canon EF11-24mm f/4L USM features superior image-quality performance from edge to edge and, furthermore, corrects for aberrations that often occur with wide-angle lenses. Through the generous use of Canon proprietary technologies, the new lens realizes both an ultra-wide-angle field of view as well as superior image quality. In addition to a ground aspherical lens element along with UD (ultra-low dispersion) and super UD lenses, which effectively minimize the occurrence of chromatic aberrations, the EF11-24mm f/4L USM employs SWC (Subwavelength Structure Coating) and ASC (Air Sphere Coating) technology, which offer advanced anti-reflective properties.

*1 Among aspherical lenses for interchangeable-lens cameras (SLR and compact system cameras). As of February 6, 2015, based on a Canon survey.
*2 Among lenses for interchangeable-lens cameras (SLR and compact system cameras). As of February 6, 2015, based on a Canon survey. Excludes fisheye lenses.