Canon EF 14mm f/2.8L II USM Ultra-Wide Angle Fixed Lens for Canon Digital SLR Cameras Lens construction is 14 elements in 11 groups Focal length is 14mm, maximum aperture is 1:2.8 and has gel filter holder at rear of lens Closest focusing distance is 7.9 inches Diagonal angle of view is 114 (on full-frame cameras) Dust and moisture proof built in lens hood Compatible with all EOS Digital SLR cameras Redesigned optics including 2 high-precision Aspherical elements and 2 new UD-glass elements Uses a rear focusing system, high-speed CPU and powerful ring-type USM with revised electronics Built-in lens hood; dust- and moisture-proof 114 diagonal view Lens not Zoomable