The Canon EF 35mm lenses are a family of wide angle prime lenses with EF mount made by Canon Inc. The family also includes one EF-S lens that only mounts on Canon bodies with APS-C sensors. Focal lengths at 35mm or less are considered wide angle on 135 film and full-frame digital bodies. This focal length is commonly used for group portraits, landscapes, street photography, and general purpose photography, due to its relatively wide-angle views and low distortion characteristics. Four EF and one EF-S 35mm lenses have been developed. Two of these are L series lens. Three of the five lenses are currently available (the 1.4L II USM, the 2 IS USM and the EF-S 2.8 Macro IS STM). 1.4L USM 1.4L II USM 2 2 IS USM EF-S 2.8 Macro IS STM Due to the crop factor of Canon APS-C (1.6x) and APS-H (1.3x) sensors, all of the 35mm lenses have a equivalent focal length of 56mm and 45.5mm respectively. EF 35mm 1.4L USM The EF 35mm 1.4L USM is a professional L series lens. It is constructed with a metal body. Features of this lens are a wide rubber focus ring that is damped, and a distance window with infrared index. The maximum aperture of 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. Autofocus speed of this lens is very fast, and the front of the lens neither rotates nor extends when focusing. EF 35mm 1.4L II USM The EF 35mm 1.4L II USM is a successor of the EF 35mm 1.4L USM. It was announced at the 27th of August 2015 and is available since October same year. The EF 35mm 1.4L II USM lens is the first lens in Canon line up to use a Blue Spectrum Refractive Optics element (BR element) to reduce the chromatic aberration at the blue end of the spectrum. This results in a better optical quality. Further it has, according to Canon, an improved weather sealing. On other hand it is roughly 20 mm longer and 180 g heavier. EF 35mm 2 The EF 35mm 2 is a prosumer level lens. It is constructed with a plastic body