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Rent NowThe Viltrox EF or EF-S to Canon EF-M-Mount Adapter is a third-party electronic lens mount adapter that lets photographers use Canon EF and EF-S lenses, originally built for Canon’s DSLR system, on Canon’s EF-M mount EOS M-series mirrorless camera bodies. It’s designed for photographers who already own a collection of Canon EF or EF-S glass and want to continue using those lenses after moving to a compact EF-M mirrorless body, without needing to replace their existing lens investment.
Unlike simple mechanical adapters that provide only a physical mount connection, this adapter maintains full electronic communication between lens and camera, supporting autofocus, aperture control, and image stabilization in a manner intended to replicate how an EF or EF-S lens behaves when mounted directly to an EF-mount DSLR. A built-in aperture motor paired with electronic contacts allows aperture to be controlled directly from the camera body, and gold-plated contact pins help ensure reliable signal transmission between lens and camera.
As a third-party alternative to Canon’s own first-party EF-EOS M adapter, compatibility and autofocus performance can vary somewhat by specific lens model, so photographers with particularly new or specialized EF lenses may want to confirm compatibility for their specific combination before relying on it for critical work.
Build quality includes a detachable tripod foot with an integrated 1/4″-20 threaded mount, helping balance larger, heavier EF lenses on the smaller EOS M body by shifting weight off the camera mount and onto the lens for better stability. The adapter is compact and lightweight, keeping with the EF-M system’s portable spirit while expanding lens compatibility.
Key Features
– Adapts Canon EF and EF-S lenses to Canon EF-M mount EOS M-series mirrorless cameras
– Full electronic communication (autofocus, aperture control, image stabilization)
– Built-in aperture motor with electronic contacts for in-camera aperture control
– Gold-plated contact pins for reliable signal transmission
– Detachable tripod foot with 1/4″-20 threaded mount
– Third-party alternative to Canon’s first-party EF-EOS M adapter (confirm compatibility for specific lenses)
– Compact, lightweight construction
