M.Zuiko ED 50-200mm F2.8 IS PRO. The 50-200mm F2.8 IS PRO is the world's only fully weathersealed, all-purpose super-telephoto zoom lens, providing a 100-400mm equivalent focal length with a constant F2.8 aperture. Weighing only 1,075 grams (2.37 pounds), it is designed for versatile shooting. When paired with advanced 5-axis sync IS, this lens allows for agile handheld photography in all conditions. 100-400mm equivalent field of view. F2.8 across the entire zoom range. Up to 800mm with MC-20 teleconverter. Up to 7.0 stops of 5-axis sync IS. Ultra-compact, weighing only 1,075g (2.37lbs) without tripod collar. IP53-certified weather sealing. Up to 1:1 maximum magnification at 0.78m with MC-20. Supports in-camera Focus Stacking. Supports up to 50 fps C-AF sequential shooting. 4 function switches and L-Fn button. World’s only 100-400mm zoom lens with a fixed F2.8 aperture. Designed for the demands of the field, delivering exceptional versatility and pro-level performance. Push your focal limits: animals in their natural environments, wildlife portraits, compressed landscapes, and intricate details of nature are made possible with a 4x zoom range that covers super-telephoto and telemacro. Speed you can count on: the world’s first 100-400mm zoom lens with a constant F2.8 aperture lets you photograph with faster shutter speeds and perform reliably in low-light conditions. Extend your reach: M.Zuiko teleconverters expand your reach up to 560mm F4.0 with MC-14, or 800mm F5.6 with MC-20. Compact, steady, and reliable: designed for photography on the go, fully weathersealed for reliable performance in any environment. Adventure-ready size: weighing just 1,075g (2.37lbs) and 1,250g (2.76lbs with tripod collar), easy to carry. Sync IS up to 7.0 stops: capture stunning images at a shutter speed of 1/3 second using a 400mm equivalent focal length with industry-leading 5-axis Sync IS. Certified all-weather performance: IP53 weather sealing protects against dust, rain, and cold. Fast and versatile: shoot up to 50fps with C-AF tracking or expand depth of field using focus stacking. FAST AF: paired with a compatible OM SYSTEM camera, supports up to 50fps C-AF for subject tracking and Pro Capture. Get closer — keep your distance: 0.5× magnification at 0.78m, or 1:1 with MC-20 teleconverter. Sharper macro, more depth: in-camera Focus Stacking combines varying focus points into one image. Crisp, clear, uncompromised: every lens meets the highest M.Zuiko standards. Optics designed for excellence: 21-element, 13-group lens with 1 EDA, 2 Super ED, 1 ED, 2 HR, and 3 E-HR elements; internal zoom preserves balance for smooth handling. Glare-resistant, outdoor-ready: front element features ZERO Coating II plus fluorine coating for water and stain repellency.