The M.Zuiko 50200mm F2.8 IS PRO is the worlds only fully weather-sealed, all-purpose100400mm equivalent super-telephoto zoom lens with a constant F2.8 aperture, weighing just 2.37 lb (1,075g). It pairs with the most powerful 5-axis sync IS, enabling handheld shooting for outdoor photography. Key Features: f2.8 across the entire zoom range Up to 7 stops of 5-axis sync IS Ultra-compact, weighing only 1,075g IP53-certified weathersealing Up to 1:1 maximum magnification at 0.78m Supports in-camera Focus Stacking Supports 50 fps C-AF sequential shooting 4 function switches and L-Fn button