Fujifilm's flagship telephoto zoom for X-mount with 152-609mm equivalent reach and weather sealing.
The Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR was released in 2016 as the dedicated super-telephoto zoom for the Fujifilm X APS-C system, providing a 152-609mm full-frame equivalent range. LM (Linear Motor) provides fast, near-silent AF suited to continuous tracking for wildlife and birds in flight. OIS is built in for handheld telephoto use. WR (weather resistance) enables outdoor use in rain with compatible weather-sealed X-series bodies. The R aperture ring provides direct manual aperture control.
The optical design uses 21 elements in 14 groups, including five ED and one Super ED element for telephoto chromatic aberration control. Nine rounded aperture blades produce smooth bokeh. The 77mm filter thread is the Fujifilm XF telephoto standard. At 1,375g the lens requires a monopod for extended wildlife sessions. Minimum focus distance of 1.75m. OIS provides handheld stability. LM motor enables fast, near-silent continuous AF. WR requires pairing with a sealed X-series body. Variable aperture from f/4.5 at 100mm to f/5.6 at 400mm.
The 152-609mm equivalent range on APS-C covers the full practical super-telephoto spectrum for birds, wildlife at distance, and outdoor sports. The Linear Motor enables smooth, near-silent focus pulls for documentary and wildlife video — important for avoiding audible AF noise in recordings. Five ED and one Super ED element provide high optical quality expected from the XF Pro lens range. WR enables field use in challenging conditions when paired with a sealed body.
On the used market the XF 100-400mm is available at XF pro telephoto pricing. Condition checks: LM motor smoothness (test video AF pull for any stepping), OIS engagement, WR sealing, aperture ring click consistency, and front element for marks. The Fujifilm XF 150-600mm f/5.6-8 R LM OIS WR provides longer reach at higher cost. Compatible with all Fujifilm X-mount bodies; WR requires a sealed X-series body for full weather protection.