Will a Minolta MD adapter autofocus on my Sony?

No — MD is a purely mechanical mount with no electrical contacts, so no adapter can drive autofocus. Focus by hand with Sony focus peaking and magnify; aperture is set on the lens's own ring.

Does the K&F MD-NEX reach infinity focus?

Yes — the 43.5 mm MD flange is far longer than Sony E's 18 mm, so a thin glassless ring reaches infinity with margin to spare. No corrective glass is involved, so image quality is entirely the lens's own.

Will it fit my Minolta Maxxum / Dynax autofocus lens?

No — those are the 44.5 mm Minolta A (Maxxum / Dynax) autofocus mount, a completely different bayonet. This ring fits only the older manual-focus SR / MC / MD Rokkor lenses. For A-mount AF glass on Sony E you need a Sony LA-EA adapter instead.

K&F Concept · Minolta SR → Sony E adapter

K&F Concept MD-NEX — Minolta SR → Sony E adapter

Minolta SR / MC / MD (Rokkor) bayonet onto Sony E. Mechanical-only: no electronics, no AF, no aperture coupling — focus by hand and set aperture on the lens's own ring, which drives the diaphragm directly with no adapter actuator needed.

At a glance

Vendor: K&F Concept
Release year: 2016
Body-side contacts: None (purely mechanical)
Flags: firmware-updatable —weather-sealed —requires glass —

What this adapter preserves

Compatibility for Minolta SR lens on a Sony E body (computed from the lensmount dataset — open the Minolta SR 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 43.5 mm MD flange clears Sony E's 18 mm by 25.5 mm, so this is a flat glassless ring with infinity preserved — no focal reducer. Note this is the manual SR/MC/MD mount, NOT the unrelated 44.5 mm Minolta/Sony A autofocus mount (which needs an LA-EA, not this ring).

Common questions

Will a Minolta MD adapter autofocus on my Sony?: No — MD is a purely mechanical mount with no electrical contacts, so no adapter can drive autofocus. Focus by hand with Sony focus peaking and magnify; aperture is set on the lens's own ring.
Does the K&F MD-NEX reach infinity focus?: Yes — the 43.5 mm MD flange is far longer than Sony E's 18 mm, so a thin glassless ring reaches infinity with margin to spare. No corrective glass is involved, so image quality is entirely the lens's own.
Will it fit my Minolta Maxxum / Dynax autofocus lens?: No — those are the 44.5 mm Minolta A (Maxxum / Dynax) autofocus mount, a completely different bayonet. This ring fits only the older manual-focus SR / MC / MD Rokkor lenses. For A-mount AF glass on Sony E you need a Sony LA-EA adapter instead.

Mounts on either side

Lens side

Minolta SR / MC / MD

Flange 43.5 mm · Minolta

Open mount page →

Body side

Sony E (incl. FE)

Flange 18 mm · Sony

Open mount page →

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