FUJIFILM XF 100-400mm f/4.5-5.6 R LM OIS WR Lens

The FUJIFILM XF 100-400mm f/4.5-5.6 R LM OIS WR Lens is a professional-grade super-telephoto zoom designed for APS-C-format Fujifilm X-mount mirrorless cameras, delivering a 152-609mm 35mm-equivalent focal range. Optimized for harsh outdoor conditions, it’s well suited to long-distance sports and wildlife photography where both reach and durability matter.

Optically, the lens is built from 21 elements in 14 groups, including five ED (Extra-low Dispersion) elements and one Super ED element, reducing chromatic aberration and fringing throughout the zoom range for results Fujifilm says are comparable to a fluorite lens. A rounded 9-blade diaphragm contributes to pleasing bokeh, with aperture adjustable in 1/3 EV steps (19 total) from f/4.5 at the wide end to f/5.6 at full telephoto, down to a minimum of f/22.

Autofocus is handled by twin linear motors, delivering smooth yet quick performance well suited to fast-moving subjects, with phase-detection AF remaining possible even at f/8 when paired with a teleconverter. A built-in focus limiter switch lets photographers constrain the focus range from 5m to infinity for quicker acquisition of distant subjects, or disengage it for the full 1.75m-to-infinity focus range. A class-leading 5.0-stop optical image stabilization system (CIPA guidelines, at telephoto) produces shake-free results even at 400mm, and automatically switches camera-shake correction to the vertical plane only if panning motion is detected. Maximum magnification reaches 0.19x at the telephoto end, enabling telephoto macro-style shooting.

Build quality includes 13 weather-resistant seals across the barrel along with a fluorine coating on the front element to repel water and grease, and the lens remains operable in temperatures as low as 14°F (-10°C). A removable, rotating tripod collar is included for stable support during extended shooting sessions, and the included lens hood features a sliding window for easy access to rotate circular polarizing or variable ND filters without removing the hood. The lens measures approximately 94.8mm in diameter by 210.5mm (wide) to 270mm (telephoto) in length, weighs approximately 1,375g, and accepts a 77mm filter thread.

The lens is compatible with Fujifilm’s XF 1.4x TC WR and XF 2x TC WR teleconverters, extending the effective focal range to 140-560mm or 200-800mm equivalent respectively.

As an APS-C-specific lens, the XF 100-400mm f/4.5-5.6 R LM OIS WR is designed exclusively for Fujifilm’s X-mount mirrorless system.

Key Features
– 100-400mm super-telephoto zoom for Fujifilm X-mount (APS-C)
– Approximately 152-609mm full-frame-equivalent field of view
– 21 elements in 14 groups, including 5 ED elements and 1 Super ED element
– Rounded 9-blade diaphragm
– Twin linear motor autofocus with focus limiter switch
– Phase-detection AF functional at f/8 (with teleconverter)
– 5.0-stop optical image stabilization with automatic panning detection
– Maximum magnification of 0.19x (telephoto)
– 13-point weather-resistant sealing; fluorine-coated front element
– Cold-resistant to 14°F (-10°C)
– Removable, rotating tripod collar
– Lens hood with sliding filter-access window
– Compatible with XF 1.4x TC WR and XF 2x TC WR teleconverters
– 77mm filter thread
– Approximate weight: 1,375g
– Designed exclusively for Fujifilm X-mount APS-C mirrorless cameras