The M.ZUIKO Digital ED 12-100mm f/4.0 IS Pro is a new travel zoom lens from Olympus for the Micro Four Thirds system. Offering a 24-200mm focal length, constant f/4 maximum aperture, fast and near-silent focusing and a manual focus clutch, read our in-depth Olympus M.ZUIKO Digital ED 12-100mm f/4.0 IS Pro review to find out if it’s the perfect travel partner for the flagship OM-D E-M1 II camera…