Canon EF to RF adapters: use EF lenses on any EOS R body

Every Canon EF and EF-S lens works on every EOS R-series body through Canon's own Mount Adapter EF-EOS R — Canon states lenses work without compromising functionality, speed or quality. Three first-party variants exist; the differences are the control ring and the drop-in filter slot, not compatibility.

Last verified 2026-08-14 · every claim below links its manufacturer source

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Adapter	Mounts	Autofocus (maker's wording)	Buy
Canon Mount Adapter EF-EOS R	Canon EF / EF-S → Canon RF	full (Canon states lenses work 'without compromising functionality, speed or quality'; the page does not use the word autofocus explicitly) Limitation: Canon: excludes RF lenses, EF-M lenses, and CN-E (EF cinema) lenses manufacturer source ↗	Amazon →
Canon Control Ring Mount Adapter EF-EOS R	Canon EF / EF-S → Canon RF	full (same basis as standard adapter; adds customizable control ring) Limitation: Canon: excludes RF/EF-M/CN-E lenses; control-ring click mechanism removable only via paid Canon service manufacturer source ↗	Amazon →
Canon Drop-In Filter Mount Adapter EF-EOS R Marked discontinued / no longer purchasable on Canon USA as of 2026-08-14	Canon EF / EF-S → Canon RF	full (same pass-through electronics; adds drop-in filter slot) Limitation: Canon USA page marks it discontinued / no longer available for purchase (as of 2026-08-14 fetch); excludes RF/EF-M/CN-E lenses manufacturer source ↗	Amazon →

Check the Canon Mount Adapter EF-EOS R price on Amazon →

Or skip the adapter: native Canon RF lenses

Adapting is a bridge, not a destination — the native range may already cover you. Every Canon RF lens that fits without an adapter: the Canon RF lens index, organized by focal length, aperture and use.

Does autofocus work with a Canon EF to RF adapter?

Canon Mount Adapter EF-EOS R: full. Canon Control Ring Mount Adapter EF-EOS R: full. Canon Drop-In Filter Mount Adapter EF-EOS R: full.

Which lenses does the canon ef to rf adapter unlock?

Canon EF / EF-S lenses become mountable on Canon RF bodies. See the full Canon RF native-lens index for what fits without an adapter.

Sources: Canon Mount Adapter EF-EOS R · Canon Control Ring Mount Adapter EF-EOS R · Canon Drop-In Filter Mount Adapter EF-EOS R — fetched and verified 2026-08-14. All mount adapters · Methodology