What filter size does the Canon RF 100-500mm f/4.5-7.1 L IS USM take?

The Canon RF 100-500mm f/4.5-7.1 L IS USM 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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Canon RF lenses that share the 77mm thread

Buy one good set of 77mm filters and it also fits:

• Canon RF 14-35mm f/4 L IS USM — 14-35mm f/4
• Canon RF 24-105mm f/4 L IS USM — 24-105mm f/4
• Canon RF 50mm f/1.2 L USM — 50mm f/1.2
• Canon RF 70-200mm f/2.8 L IS USM — 70-200mm f/2.8
• Canon RF 70-200mm f/4 L IS USM — 70-200mm f/4

Screw-in filters are mount-agnostic — 30 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: Canon RF 100-500mm f/4.5-7.1 L IS USM

Canon RF 100-500mm f/4.5-7.1 L IS USM

Fits

Canon EOS R6 Mark II, Canon EOS R7, Canon EOS R50 and 13 more Canon RF cameras

Type

telephoto zoom 100-500mm

Max aperture

f/4.5-7.1

Weight

1365 g

Weather-sealed

Yes

See price on Amazon

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.