This M.Zuiko Digital MC-14 1.4x Teleconverter from Olympus between a compatible lens and a Micro Four Thirds mount camera, provides a 1.4x magnification factor to dramatically boost the apparent focal length of the lens with minimal increase to the size or weight of the camera and lens combined. Featuring a metal build that is freeze, splash, and dustproof, it utilizes six optical elements. M.Zuiko Digital ED 40-150mm f/2.8 PRO (with firmware v1.3 or later). M.Zuiko Digital ED 100-400mm f/5-6.3 IS. M.Zuiko Digital ED 150-400mm f/4.5 TC1.25X IS PRO. M.Zuiko Digital ED 300mm f/4 IS PRO (with firmware v1.4 or later).