This professional L-Series prime lens is an ideal general-purpose solution for the professional’s kit bag. With a large maximum aperture of f/1.2 its fast when shooting in low light, with excellent control over focusing for shallow depth of field and creative effects when on location. For a truly professional finish, the ring-type Ultra Sonic Motor (USM) drives fast and quiet autofocus, with a circular 8-bladed aperture diaphragm giving out-of-focus areas an even softer look and elegant bokeh. Part of the Canon professional L-series flagship range, its designed for robust handling and resistant to dust and moisture.