OM SYSTEM M.Zuiko Digital ED 100-400mm f/5-6.3 IS II Lens (Micro Four Thirds)

The OM SYSTEM M.Zuiko Digital ED 100-400mm f/5-6.3 IS II Lens (Micro Four Thirds) is a compact, weather-sealed super-telephoto zoom delivering a 200-800mm full-frame-equivalent focal range, an upgrade over the original Olympus 100-400mm f/5-6.3 IS. Packing exceptional telephoto reach into a lightweight design, it’s an ideal choice for bird, wildlife, sports, and nature photography, as well as tele-macro work.

Optically, the lens is built from 21 elements in 15 groups, including four extra-low dispersion (ED) elements, two Super HR (High Refractive Index) elements, and two HR elements, working to minimize chromatic and spherical aberrations for high clarity throughout the zoom range. OM System’s ZERO (Zuiko Extra-low Reflection Optical) coating, paired with a fluorine-coated front element, minimizes ghosting and flare while repelling moisture and smudges for easier cleaning. A rounded 9-blade diaphragm contributes to beautiful bokeh.

Autofocus uses OM System’s MSC (Movie & Still Compatible) mechanism for quiet, fast focusing, along with an adjustable focus limiter switch that restricts the focusing distance range to speed up autofocus acquisition. A standout feature is the lens’s close-focusing capability, with a minimum focusing distance of 1.3m, yielding a 0.57x equivalent maximum magnification (0.29x on Micro Four Thirds sensors) for outstanding tele-macro performance, and the lens supports Focus Stacking on compatible OM System camera bodies. Built-in optical image stabilization compensates for 4.5 stops of shake correction on its own, and this “II” version introduces advanced 5-axis Sync IS, delivering up to 7.0 stops of compensation when paired with compatible OM System camera bodies featuring in-body stabilization (a meaningful upgrade over the original version’s 3.0-stop lens-only rating).

Build quality includes a removable, rotating tripod collar for balanced support and quick switching between horizontal and vertical orientations, along with IPX1-rated weather sealing for reliable performance in dusty or damp conditions. The lens measures approximately 86.4 x 205.6mm, weighs approximately 1,125g, and accepts a 72mm filter thread. It’s compatible with OM System’s MC-20 2x teleconverter, extending the effective reach up to an impressive 1600mm equivalent.

As a Micro Four Thirds-specific lens, the M.Zuiko Digital ED 100-400mm f/5-6.3 IS II is designed exclusively for Micro Four Thirds mirrorless cameras from OM System/Olympus, Panasonic, and other Micro Four Thirds alliance manufacturers (note that Sync IS functions only with OM System in-body stabilization, not Panasonic IBIS).

Key Features
– 100-400mm super-telephoto zoom for Micro Four Thirds
– Approximately 200-800mm full-frame-equivalent focal range
– Maximum aperture f/5.0 (wide) to f/6.3 (telephoto)
– 21 elements in 15 groups, including 4 ED, 2 Super HR, and 2 HR elements
– ZERO (Zuiko Extra-low Reflection Optical) coating with fluorine-coated front element
– MSC (Movie & Still Compatible) autofocus with focus limiter switch
– Optical Image Stabilizer, up to 4.5 stops (lens only)
– 5-axis Sync IS, up to 7.0 stops with compatible OM System IBIS bodies
– Rounded 9-blade diaphragm
– Minimum focusing distance of 1.3m; 0.57x equivalent maximum magnification
– Supports Focus Stacking on compatible bodies
– Removable, rotating tripod collar
– IPX1-rated weather-sealed construction
– Compatible with MC-20 2x teleconverter (up to 1600mm equivalent reach)
– 72mm filter thread
– Approximate weight: 1,125g
– Compatible with Micro Four Thirds mirrorless cameras (OM System/Olympus, Panasonic, and alliance partners)