The EF 35 mm f/1.4L USM is a professional L series lens. It is constructed with a plastic body and metal mount. The screw-on filter thread at the front is metal. Features of this lens are a wide rubber focus ring that is damped, and a distance window with infrared index. The maximum aperture of f/1.4 gives this lens the ability to create shallow depth of field and smooth bokeh effects. The optical construction of this lens contains 11 lens elements in 9 groups, including one ground and polished aspherical lens element. It uses a rear floating focusing system, powered by a ring type USM motor. Auto focus speed of this lens is very fast, and the front of the lens neither rotates nor extends when focusing.
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