Fotodiox FD-RF — Canon FD → Canon RF adapter

What it does

Common questions

Why won't my FD lens stop down on a plain adapter?

Canon FD lenses keep the diaphragm wide open until the body — or the adapter — actuates the stop-down lever. A proper FD adapter has a ring or fixed actuator that holds the lever so the lens's aperture ring controls the diaphragm. Avoid the cheapest rings that omit it: the aperture won't work.

Is there a Canon first-party FD-to-RF adapter?

No. Canon discontinued the FD system in 1987, years before RF existed, and never produced an FD→RF (or FD→EF) adapter without optics. Every FD→RF adapter is a third-party mechanical ring from Fotodiox, Urth, K&F and similar.

Does it reach infinity without a glass element?

Yes — the 42 mm FD flange is well beyond RF's 20 mm, so a glassless ring focuses to infinity. Adapting FD to the long-flange EF mount needed a corrective-glass adapter; FD→RF does not, which is a big reason FD glass found new life on RF and mirrorless.

Mounts on either side

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