The 50mm f/1.4 AS IF UMC Lens from Rokinon offers a standard 50mm focal length in the full-frame format and a very fast f/1.4 maximum aperture for effective low light capture fast shutter speed shooting and shallow depth of field control. When used on cameras with an APS-C format sensor its 35mm focal length equivalence is 75mm. The optical design of the lens consists of 9 elements in 6 groups including one hybrid aspherical element and one aspherical element to reduce chromatic aberrations. Also lens elements are coated with an Ultra Multi-Coating to improve light transmission and minimize flare and ghosting. Eight diaphragm blades create a circular aperture for more attractive out-of-focus highlights.