The Olympus M.Zuiko ED 12-100mm f/4 IS PRO is a 24-200mm equivalent zoom designed for Micro Four Thirds mirrorless cameras. Characterised by its f/4 constant maximum aperture, this lens offers consistent performance throughout the zoom range to suit both stills and video shooting. Its optical design incorporates a slew of low dispersion and aspherical elements in order to reduce both chromatic and spherical aberrations, and both a ZERO coating and a Z Coating Nano have been applied to greatly reduce lens flare and ghosting for improved contrast.