The M.ZUIKO 40-150mm f2.8 PRO is a compact, full-featured zoom that sports premium metal construction and professional-quality lens elements. Its light in weight and fully sealed for weather protection, delivers super-sharp edge-to-edge image quality, and boasts the worlds first Dual VCM autofocus mechanism. This lens is an excellent complement to your fast primes and 12-40mm f2.8 PRO.