What filter size does the Yongnuo YN 50mm f/1.8X DA DSM take?

The Yongnuo YN 50mm f/1.8X DA DSM takes 49mm screw-in filters — its front filter thread is 49mm. Any standard 49mm UV, polarizer or ND filter screws straight on.

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Fujifilm X lenses that share the 49mm thread

Buy one good set of 49mm filters and it also fits:

• Fujifilm XF 16mm f/2.8 R WR — 16mm f/2.8
• Fujifilm XC 13-33mm f/3.5-6.3 OIS — 13-33mm f/3.5-6.3

Screw-in filters are mount-agnostic — 7 verified lenses on other mounts also take 49mm: see every 49mm lens.

A step-up ring also lets a 49mm lens use one size-larger filters, which is how many photographers standardize a single filter set across lenses.

All 49mm lenses: the 49mm hub · every covered lens: filter sizes index · this lens on Amazon: Yongnuo YN 50mm f/1.8X DA DSM

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.