Lens adapter compatibility

Canon EF-S lenses on Samsung NX cameras

Can you use Canon EF-S lenses on Samsung NX cameras? Yes, with a simple mechanical adapter (manual focus). The Canon EF-S flange distance is 44.00 mm and Samsung NX is 25.50 mm, a difference of +18.50 mm.

+18.50 mm
Space for the adapter
44.00 mm
Canon EF-S flange
25.50 mm
Samsung NX flange
Verdict: Yes — a simple 18.5 mm adapter keeps infinity focus.

What to expect#

Aperture control: lenses with a manual aperture ring work directly; electronically controlled lenses (no ring) need a smart adapter or one with a built-in aperture lever.

Focus: use focus peaking and magnification in the viewfinder. Exposure metering works normally because the camera meters through the lens at working aperture.

Crop factor: on a 1.5× crop Samsung NX body a 50 mm Canon EF-S lens frames like 75 mm. A focal reducer (“speed booster”) can bring back some width and gain about a stop of light.

Other systems for Canon EF-S lenses#

Frequently asked questions#

Will Canon EF-S lenses autofocus on Samsung NX?

No — adapted lenses are manual focus on this combination.

Does a Canon EF-S to Samsung NX adapter affect image quality?

A glass-free adapter is just a precisely machined spacer, so image quality is unchanged when it is built to the right thickness. Cheap adapters can be slightly too thin or thick, which shifts the infinity mark.

Last updated October 03, 2026 · How we calculate · Sources