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Adapters let vintage M42 lenses work on mirrorless bodies, usually with manual focus.

This guide is built from Amazon product listings and maker specs, not our own testing, so confirm compatibility, kit contents and current price on each product page.

Prices are approximate US dollar conversions of what Amazon showed on October 31, 2026.

Last updated: November 1, 2026.

Quick Picks

Product Type Best for
Hersmay M42 to EOS RF Adapter Lens mount adapter Vintage M42 lenses on Canon RF
K&F Concept M42 to Sony E (NEX) Adapter Lens mount adapter Vintage M42 lenses on Sony E
Fotodiox Pro M42 to Sony E Adapter Lens mount adapter M42 type 2 lenses on Sony E
K&F Concept M42 to Fuji X Adapter Lens mount adapter Vintage M42 lenses on Fujifilm X
K&F Concept M42 to Fuji FX Adapter Ring Lens mount adapter M42 on Fuji X-Pro1 and similar

Our Picks

1. Hersmay M42 to EOS RF Adapter

A Hersmay M42-EOSR M42 to EOS RF lens mount adapter for Canon EOS R, RP, R5 and others, per the listing. It was shown at about $12 on Amazon.com on October 31, 2026.

Good for: Vintage M42 lenses on Canon RF. Watch out: manual focus only.

Check on Amazon

2. K&F Concept M42 to Sony E (NEX) Adapter

A K&F Concept lens mount adapter for M42 lens to NEX E-mount cameras, per the listing. It was shown at about $17 on Amazon.com on October 31, 2026.

Good for: Vintage M42 lenses on Sony E. Watch out: manual focus only.

Check on Amazon

3. Fotodiox Pro M42 to Sony E Adapter

A Fotodiox Pro lens mount adapter for M42 type 2 lenses to Sony E-mount cameras, per the listing. It was shown at about $25 on Amazon.com on October 31, 2026.

Good for: M42 type 2 lenses on Sony E. Watch out: manual focus only.

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4. K&F Concept M42 to Fuji X Adapter

A K&F Concept M42 to Fuji X lens mount adapter for M42 screw mount lenses, per the listing. It was shown at about $36 on Amazon.com on October 31, 2026.

Good for: Vintage M42 lenses on Fujifilm X. Watch out: manual focus only.

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5. K&F Concept M42 to Fuji FX Adapter Ring

A K&F Concept lens mount adapter ring for M42 42mm screw lenses to Fujifilm FX / X-Pro1, per the listing. It was shown at about $27 on Amazon.com on October 31, 2026.

Good for: M42 on Fuji X-Pro1 and similar. Watch out: manual focus only.

Check on Amazon

How to Choose

Mount

Match your camera.

Focus

Manual only.

Infinity focus

Check each listing.

Frequently Asked Questions

Do adapters keep autofocus?

No, these are manual.

Cheapest?

Hersmay for Canon RF.

Sony?

K&F or Fotodiox.

Bottom Line

Choose the adapter for your camera mount and expect manual focus.

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