Designed for full compatibility with the M.ZUIKO DIGITAL ED 40-150mm f/2.8 PRO and M.ZUIKO DIGITAL ED 300m f/4 PRO lenses, the MC-14's 1.4x magnification factor will provide users with a lens focal length of 56-210mm and 420mm, respectively. These are equivalent to 112-420mm and 840mm in 35mm format. It also features a metal build that is dust-, freeze-, and splash-proof and utilizes 6 optical elements. Additionally, a case is included for storage and protection.