The ROKINON 50mm f/1.4 AS IF UMC Digital Photo Lens is a high performance prime 50mm lens, considered to be the “standard” focal length for Full Frame Format, fills the gap between the highly rated Rokinon 35mm and 85mm models. Offering a very fast f/1.4 maximum aperture, low light shooting, action stopping fast shutter speeds, and shallow depth of field control are yours to enjoy.