The Olympus M.Zuiko Digital ED 45mm f/1.2 PRO lens features a 90mm-equivalent focal length with an ultra-fast f/1.2 maximum aperture. The combination of the slightly narrow field of view and bright aperture enables producing distinct shallow depth of field imagery and also suits working in difficult lighting conditions. The lens is characterized by its advanced 14 elements in 10 groups of optical design. The design incorporates low dispersion, aspherical and high refractive index glass elements to control a variety of aberrations and distortion for great sharpness, clarity, and color fidelity. It also features a Movie & Still Compatible (MSC) autofocus system for smooth, quiet and fast focusing performance which suits both stills and video recording. The Z Coating Nano has been applied to individual elements to limit flare and ghosting for improved contrast. The lens has a nine-blade aperture to achieve a smooth bokeh quality when working with shallow depth of field techniques. The lens physical design is characterized by a weather-sealed construction to benefit working in harsh climates.