The M.Zuiko Digital ED 45mm f/1.2 PRO from Olympus pairs the desirable 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 the production of distinct shallow depth of field imagery and also suits working in difficult lighting conditions. A nine-blade aperture is featured as well, to achieve a smooth bokeh quality when working with shallow depth of field techniques, and a Z Coating Nano has been applied to individual elements to limit flare and ghosting for improved contrast. It also features a Movie & Still Compatible (MSC) autofocus system for smooth, quiet, and fast focusing performance that is suitable for both stills and video recording. Notably fast f/1.2 maximum aperture supports working in difficult lighting conditions and affords extensive control over depth of field for selective focus techniques. The complex optical design incorporates one extra-low dispersion element, four high refractive index elements, and one aspherical element, which all work in concert to control chromatic and spherical aberrations for improved clarity, reduced color fringing, and enhanced sharpness. An MSC autofocus system, along with an internal focusing design, provides quick, quiet, and precise focusing performance to benefit both still photo shooting and movie recording. Additionally, an MF clutch is used for fast changing to manual focus for more precise control. Weather-sealed construction guards the lens against dust, moisture, and freezing temperatures for working in harsh environments.