The Olympus EZ-M1240 M.Zuiko 12-40mm f2.8 PRO Lens has a large-diameter and is a truly versatile F2.8 zoom lens with dustproof, splash-proof and freeze-proof construction. Maximum image magnification of 0.3x Maximum aperture of F2.8 84° to 30° angle of view Dustproof and splash-proof construction The Olympus EZ-M1240 M.Zuiko 12-40mm f2.8 PRO Lens possesses optical performance that exceeds that of four thirds of high grade lenses. A rational lens design of 14 elements in 9 groups, including 2 ED lenses, 1 EDA lens and 2 HR lenses, enables a compact form and excellent image capture. MSC mechanism The MSC (Movie and Still Compatible) mechanism achieves fast and silent focusing with a lightweight form and minimum number of lenses, employing an inner focus system. Auto focusing by optimally controlling the three small, lightweight lenses allows users to comfortably shoot still images and movies. Using a compact, lightweight focusing unit consisting of two cemented lenses, MSC enables fast, quiet auto focusing. ZERO lens coating ZERO (Zuiko Extra-low Reflection Optical) Coating on the surface of the lens eliminates ghosts and flares despite their high transparency. ZERO Coating boasts clear image quality even under challenging conditions such as backlighting. Manual focus clutch mechanism makes instant switching to manual focus easy The lens is equipped with the manual focus clutch mechanism, making switching to manual focus easy and instant by pulling the focusing ring towards you.