Olympus M.ZUIKO DIGITAL ED 300mm F4 PRO is the first single-focal-length super telephoto lens in the M.ZUIKO PRO series at 600mm (35mm equivalent). This lens has superb depictive performance as well as mobility and dustproof/splashproof performance that are perfect for even professional use. World's most compact, lightweight 300mm (600mm equivalent) f4.0 super-telephoto lens make super-telephoto hand-held photography possible World's most powerful 6-steps of compensation synchronized in-lens and in-body I.S. 600mm Short-Distance Photography - Closest focusing distance of 1.4m Maximum image magnification of 0.48x (35mm equiv.) telemacro photography Splash, Dust and Freezeproof Design Manual Focus Clutch & Lfn button to instantly switch shooting styles Body IS & Lens IS combined to maximize image stabilization (when used with E-M1 or E-M5 Mark II) 3 Super ED Lenses suppress color bleeding and chromatic aberrations High-precision, large-diameter thin GKL lenses for fast autofocus ZERO & New Nano Coating Z significantly reduces ghosts and flares Fast AF speed of 300 ms or less with OM-D E-M1 Combined with MC-14 Teleconverter maximum Micro Four Thirds focal length of 840mm (35mm equivalent) is achieved. OM-D Silent Shutter and 300mm f4.0 PRO Lens allows for discreet telephoto shootingFeaturesCompact, high-performance super-telephoto lens with dustproof/splashproofThe first single-focal-length lens in the M.ZUIKO PRO series. With a focal length of 600mm (35mm equivalent), this is a compact, high-performance super-telephoto lens.SpecificationsFocal Length300mm35mm Equivalent Focal Length600mmLens Construction17 Elements in 10 Groups (3 Super ED lenses, 3 HR lenses,1 E-HR lens)Dust & Drip ProofYesFocusing SystemHigh-speed Imager AF (MSC)Angle of View4.1 DegreeClosest Focusing Distance1.4mMaximum Image Magnification0.24x (+MC-14 0.34x)35mm Equivalent Max. Image Magnification0.48x (+MC-14 0.67x)Minimum Field Size72.1 54.2mm (+MC-14 50.9 38.2mm)Number of Blades9 (Circular Aperture Diaphragm)Maximum Aperturef4Minimum Aperturef22Lens IS Mechanism</s