What filter size does the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR take?

The Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR takes 77mm screw-in filters — its front filter thread is 77mm. Any standard 77mm UV, polarizer or ND filter screws straight on.

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Fujifilm X lenses that share the 77mm thread

Among the Fujifilm X lenses we have verified so far, this is the only one on 77mm.

Screw-in filters are mount-agnostic — 17 verified lenses on other mounts also take 77mm: see every 77mm lens.

A step-up ring also lets a 77mm lens use one size-larger filters, which is how many photographers standardize a single filter set across lenses.

All 77mm lenses: the 77mm hub · every covered lens: filter sizes index · this lens on Amazon: Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR

Thread sizes verified 2026-08-28 against community-maintained per-mount lens specification tables (compiled from the manufacturers' own spec sheets), matched brand-strictly to our lens index. Lenses whose thread we could not uniquely verify are left out rather than guessed — coverage grows as verified data lands.