What filter size does the Sigma 90mm f/2.8 DG DN Contemporary take?

The Sigma 90mm f/2.8 DG DN Contemporary takes 55mm screw-in filters — its front filter thread is 55mm. Any standard 55mm UV, polarizer or ND filter screws straight on.

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L-Mount lenses that share the 55mm thread

Buy one good set of 55mm filters and it also fits:

• Sigma 18-50mm f/2.8 DC DN Contemporary — 18-50mm f/2.8
• Sigma 56mm f/1.4 DC DN Contemporary — 56mm f/1.4

Screw-in filters are mount-agnostic — 22 verified lenses on other mounts also take 55mm: see every 55mm lens.

A step-up ring also lets a 55mm lens use one size-larger filters, which is how many photographers standardize a single filter set across lenses.

All 55mm lenses: the 55mm hub · every covered lens: filter sizes index · this lens on Amazon: Sigma 90mm f/2.8 DG DN Contemporary

Thread sizes verified 2026-09-03 against per-mount lens specification tables and, where no such table exists (L-mount), the manufacturers’ own published specification pages, 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.