and a metal mount. This lens features a distance window with infrared index. The maximum aperture of 2 gives this lens the ability to create depth of field effects, but not to the same shallowness of the EF 35mm 1.4L USM, while its five-blade diaphragm may produce background blur (bokeh). The optical construction of this lens contains seven lens elements, without any special lens elements. It uses a linear extension focusing system, powered by an AFD motor. Auto focus speed of this lens is moderately fast, but focusing does make some sound. The front of the lens does not rotate when focusing, but does extend. EF 35mm 2 IS USM The EF 35mm 2 is an enthusiast-level lens. Like the original version of the 2 lens, it has a plastic body and a metal mount, but adds image stabilization. It also has an eight-blade diaphragm with rounded blades, as opposed to the eight non-rounded blades of the 1.4L lens and the five non-rounded blades of the original 2 model. This lens features a distance window with infrared index. The optical construction of this lens contains 10 elements in 8 groups, including one molded aspherical element. It uses a ring-type USM motor. The front of the lens neither rotates nor extends when focusing. EF-S 35mm 2.8 Macro IS STM The EF-S 35 mm 2.8 Macro IS STM, like all other EF-S lenses, can only be mounted to a Canon camera with EF-S mount and not to a camera with EF mount. The lens has image stabilization and uses a Stepping motor for the focus. It is the first 35mm lens from Canon with macro capability. It supports a magnification up to 1:1, and also includes a built-in ring light. Specifications See also Canon EF 200mm lens Canon EF 135mm lens Canon EF 100mm lens Canon EF 85mm lens Canon EF 50mm lens Canon EF 40mm lens Canon EF 24mm lens Canon EF 14mm lens References EF Lenses - Canon Camera Museum External links Canon EF lenses