Can I stop down a Canon EF lens on the Fotodiox Vizelex ND Throttle?

No — the standard ND Throttle EF-NEX has no electronics, and EF lenses have no mechanical aperture ring (EF aperture is fully electronic), so the iris stays wide open. That's by design: you control exposure with the built-in variable ND instead. For real aperture control on EF glass over Sony E, use an electronic adapter such as the Sigma MC-11, Metabones EF-E Mark V, or Viltrox EF-NEX IV.

Does the built-in variable ND cause an X-pattern at high density?

Like all variable NDs (crossed polarisers), pushing toward maximum density can introduce uneven 'X' cross-banding, especially on wide lenses. Staying within the lower ~2–6 stop range avoids it; treat the very top of the range as a last resort.

Will it autofocus or report lens EXIF?

No to both — it's a mechanical adapter with no electronic contacts. Focus manually with Sony peaking / magnify; no aperture or lens EXIF is recorded. The trade-off buys you the in-path variable ND that electronic EF → E adapters don't offer.

Fotodiox · Canon EF → Sony E adapter

Fotodiox Vizelex ND Throttle EF-NEX — Canon EF → Sony E adapter

Built-in variable ND filter (≈2–8 stops) dialled via a rotating ring on the adapter body — the defining feature, giving exposure control without front filters.

At a glance

Vendor: Fotodiox
Release year: 2014
Body-side contacts: None (purely mechanical)
Flags: firmware-updatable —weather-sealed —requires glass —

What this adapter preserves

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

Focus: Full AF
IS: IS / IBIS preserved
Aperture: Electronic aperture
Infinity focus: Reaches infinity

What it does

Purely mechanical: no electronic contacts, no AF, no aperture coupling. Because EF lenses set aperture electronically, every EF lens stays at its maximum aperture on this adapter — the built-in ND is how you control exposure and bright-light depth instead of stopping the iris down.

Not a focal reducer — the ND is flat glass, so field of view and infinity focus are unchanged (EF 44.0 mm → Sony E 18.0 mm leaves ample mechanical clearance).

Common questions

Can I stop down a Canon EF lens on the Fotodiox Vizelex ND Throttle?: No — the standard ND Throttle EF-NEX has no electronics, and EF lenses have no mechanical aperture ring (EF aperture is fully electronic), so the iris stays wide open. That's by design: you control exposure with the built-in variable ND instead. For real aperture control on EF glass over Sony E, use an electronic adapter such as the Sigma MC-11, Metabones EF-E Mark V, or Viltrox EF-NEX IV.
Does the built-in variable ND cause an X-pattern at high density?: Like all variable NDs (crossed polarisers), pushing toward maximum density can introduce uneven 'X' cross-banding, especially on wide lenses. Staying within the lower ~2–6 stop range avoids it; treat the very top of the range as a last resort.
Will it autofocus or report lens EXIF?: No to both — it's a mechanical adapter with no electronic contacts. Focus manually with Sony peaking / magnify; no aperture or lens EXIF is recorded. The trade-off buys you the in-path variable ND that electronic EF → E adapters don't offer.

Mounts on either side

Lens side

Canon EF

Flange 44 mm · Canon

Open mount page →

Body side

Sony E (incl. FE)

Flange 18 mm · Sony

Open mount page →

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