Does the aperture ring work on a Canon FD lens adapted to Sony?

Yes, provided the adapter has the FD aperture actuator (Fotodiox's does). FD lenses sit wide open without it; the actuator holds the stop-down lever so the lens ring then sets the diaphragm normally.

Will FD lenses autofocus on Sony?

No — FD is a manual, pre-autofocus mount with no electrical contacts. Focus by hand with peaking and magnify on the α body; aperture is manual via the lens ring.

FD-NEX or FD-RF — which do I need?

FD-NEX fits Sony E (NEX / α7 / α6000-series); FD-RF fits Canon EOS R bodies. Both are glassless mechanical rings that reach infinity — pick the one matching your camera's mount. The FD glass renders identically either way.

Fotodiox · Canon FD → Sony E adapter

Fotodiox FD-NEX — Canon FD → Sony E adapter

Canon FD / FL and New FD lenses onto Sony E. Mechanical ring with a built-in aperture actuator that holds the FD stop-down lever so the lens's aperture ring works. No AF, no electronics.

At a glance

Vendor: Fotodiox
Release year: 2011
Body-side contacts: None (purely mechanical)
Flags: firmware-updatable —weather-sealed —requires glass —

What this adapter preserves

Compatibility for Canon FD lens on a Sony E body (computed from the lensmount dataset — open the Canon FD to Sony E adapter page for the full verdict, flange clearance, and adapter caveats).

Focus: Manual focus only
IS: No IS
Aperture: Manual aperture ring
Infinity focus: Reaches infinity

What it does

The 42 mm FD flange clears Sony E's 18 mm by 24 mm — glassless, infinity preserved. Compact FD primes (50/1.4 SSC, 28/2.8) suit small α bodies; the cult FD 55 mm f/1.2 SSC Aspherical and 85 mm f/1.2 L are the headline adapts.

Common questions

Does the aperture ring work on a Canon FD lens adapted to Sony?: Yes, provided the adapter has the FD aperture actuator (Fotodiox's does). FD lenses sit wide open without it; the actuator holds the stop-down lever so the lens ring then sets the diaphragm normally.
Will FD lenses autofocus on Sony?: No — FD is a manual, pre-autofocus mount with no electrical contacts. Focus by hand with peaking and magnify on the α body; aperture is manual via the lens ring.
FD-NEX or FD-RF — which do I need?: FD-NEX fits Sony E (NEX / α7 / α6000-series); FD-RF fits Canon EOS R bodies. Both are glassless mechanical rings that reach infinity — pick the one matching your camera's mount. The FD glass renders identically either way.

Mounts on either side

Lens side

Canon FD

Flange 42 mm · Canon

Open mount page →

Body side

Sony E (incl. FE)

Flange 18 mm · Sony

Open mount page →

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