Can Leica M lenses autofocus on a Sony E or Nikon Z body?

Only through the Techart LM-EA9 (Sony E) or Megadap MTZ11 (Nikon Z) autofocus adapters — both have an in-adapter floating element that micro-shifts the lens approximately 4.5 mm to drive AF on a lens that has no AF motor of its own. The result is single-shot AF with focus-acquisition speeds slower than a native AF lens, but usable for portraits and street work.

What's the difference between Leica M and Leica L (TL/SL) mount?

M is the rangefinder bayonet (1954, manual focus, 27.8 mm flange) used on M3, M6, M7, M10, M11 film and digital rangefinders. L is the autofocus mirrorless mount (2014, 20 mm flange) used on Leica SL / CL / TL bodies and shared with Panasonic and Sigma under the L-Mount Alliance. Leica's own M-to-L adapter mounts M lenses onto SL bodies with 6-bit lens detection preserved.

What's 6-bit lens coding on Leica M lenses?

A six-dot pattern Leica started milling onto the M-mount flange in 2006 (on lenses sold after that year) — the camera body reads it optically and writes the lens model into EXIF, applies lens-specific vignetting and colour correction, and selects the appropriate viewfinder framelines on M-series rangefinder bodies. Older lenses can be coded retroactively by Leica's service department or with after-market self-coding kits.

Leica · Rangefinder mount

Leica M — flange distance, protocol, and adapter compatibility

Leica's rangefinder bayonet, in production since 1954 and still active on the M11. Manual-focus only, but with 6-bit lens-coding for in-body lens detection. The compact body of M lenses (designed for the short 27.8 mm rangefinder flange) makes them prime candidates for adapting onto mirrorless — especially Sony E and Fujifilm X.

Mount specifications

Flange focal distance: 27.8 mm
Throat diameter: 44 mm
Electronic protocol: Mechanical only (no electronic coupling)
Supported formats: full-frame, APS-C
Manufacturer: Leica
Introduced: 1954
Status: Active production

Leica M on the flange-distance axis

Leica M sits at 27.8 mm — highlighted in orange below. The flange-distance gap between the mirrorless and SLR clusters is the room a mechanical adapter occupies; that gap is why almost every SLR lens adapts onto every mirrorless body, and why the reverse is mechanically impossible.

Flange focal distance (mm)SLR / DSLRMirrorlessRangefinderMedium-format mirrorlessCinemaLegacy SLR

Adapting Leica M lenses onto other bodies

You own Leica M glass and want to mount it on a body with a different lens mount. Rows are sorted by feasibility.

Body mount	Result	Adapter examples	Caveats
Body mount Canon RF flange 20 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Leica M lens and Canon RF body.
Body mount Canon EF-M flange 18 mm	Mechanical MFno ISAp. ring1.5× crop	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Leica M lens and Canon EF-M body.
Body mount Nikon Z flange 16 mm	Mechanical AF partialno ISAp. ring	Megadap MTZ11 (motorised AF M-adapter) Generic M-Z rings (Urth, K&F, Fotodiox)	Megadap MTZ11 adds autofocus by mechanically extending the rear flange via a 4.5 mm voice-coil tube — works with any M-mount lens (Leica, Voigtländer, Zeiss ZM, 7Artisans, TT Artisan). AF speed is leisurely by design; brilliant for static or low-motion work, not for sports / wildlife.
Body mount Sony E (incl. FE) flange 18 mm	Mechanical MFno ISAp. ring	Voigtländer VM-E Close Focus Techart LM-EA9 (autofocus M adapter) Generic M-NEX rings	Manual focus by design; Techart LM-EA9 adds AF by mechanically extending the rear flange. Wide M-mount lenses can show colour cast / smearing on the sensor edges; mitigated on later A7 generations.
Body mount Fujifilm X flange 17.7 mm	Mechanical MFno ISAp. ring1.5× crop	Voigtländer VM-X Close Focus Generic M-FX rings	Manual focus only; APS-C crop turns 50 mm M-mount into a ~75 mm equivalent.
Body mount Micro Four Thirds flange 19.25 mm	Mechanical MFno ISAp. ring2× crop	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Leica M lens and Micro Four Thirds body.
Body mount L-Mount flange 20 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Leica M lens and L-Mount body.
Body mount Canon RF (cine) flange 20 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Leica M lens and Canon RF (cine) body.
Body mount C-mount flange 17.526 mm	Mechanical MFno ISAp. ring2.7× crop	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Leica M lens and C-mount body.
Body mount Fujifilm GFX (G-mount) flange 26.7 mm	Speed booster MFIS lens-onlyAp. wheelvignettes	Speed Booster / focal-reducer family	Flange clearance is only 1.1 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.	Speed Booster equivalence calculator Plug in any Leica M lens and pick the focal-reducer family. The calc returns the effective focal length and aperture on a Fujifilm GFX (G-mount) (medium-format), plus the full-frame equivalent angle of view after the body's crop stacks on top. Lens focal length (mm)Max aperture (f/N)Focal-reducer family Effective focal length 35.5 mm 50.0 mm × 0.71 on the reducer. Effective aperture f/1.28 0.99 stops brighter than f/1.80. Full-frame equiv. angle of view 28.0 mm 35.5 mm × 0.79× (medium-format sensor crop). A focal reducer concentrates the lens's image circle, so both focal length and f-number scale by the same ratio (stops gained = `−2 · log₂(ratio)`). The body's crop factor still applies on top — the full-frame-equivalent angle-of-view multiplier is ratio × body crop. Calculator is informational; verify against the adapter vendor's per-lens compatibility chart before purchase.

Adapting other lenses onto a Leica M body

You own a Leica M body and want to mount glass from other systems. Mirrorless-lens-onto-DSLR-body combinations are omitted (rear element collides with the mirror box).

Lens mount	Result	Adapter examples	Caveats
Lens mount Canon EF flange 44 mm	Mechanical MFIS lens-onlyAp. wheel	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Canon EF lens and Leica M body. Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Lens mount Canon EF-S flange 44 mm	Mechanical MFIS lens-onlyAp. wheelvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Canon EF-S lens and Leica M body. Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Lens mount Canon FD flange 42 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Canon FD lens and Leica M body.
Lens mount Nikon F flange 46.5 mm	Mechanical MFIS lens-onlyAp. wheel	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Nikon F lens and Leica M body. Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Lens mount Sony A / Minolta A flange 44.5 mm	Mechanical MFIS lens-onlyAp. wheel	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Sony A / Minolta A lens and Leica M body. Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Lens mount M42 (Pentax / Praktica screw mount) flange 45.46 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between M42 (Pentax / Praktica screw mount) lens and Leica M body.
Lens mount Pentax K flange 45.46 mm	Mechanical MFIS lens-onlyAp. wheel	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Pentax K lens and Leica M body. Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Lens mount PL (Positive Lock) flange 52 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between PL (Positive Lock) lens and Leica M body.
Lens mount Canon EF (cine) flange 44 mm	Mechanical MFIS lens-onlyAp. wheel	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Canon EF (cine) lens and Leica M body. Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Lens mount Exakta flange 44.7 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Exakta lens and Leica M body.
Lens mount T-mount (T2) flange 55 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between T-mount (T2) lens and Leica M body.
Lens mount Praktica B flange 44.4 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Leica M body.
Lens mount Konica AR flange 40.5 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Konica AR lens and Leica M body.
Lens mount Minolta SR / MC / MD flange 43.5 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Minolta SR / MC / MD lens and Leica M body.
Lens mount Olympus OM flange 46 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Olympus OM lens and Leica M body.
Lens mount Contax/Yashica (C/Y) flange 45.5 mm	Mechanical MFno ISAp. ring	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Contax/Yashica (C/Y) lens and Leica M body.
Lens mount Canon RF flange 20 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -7.8 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount Canon EF-M flange 18 mm	Speed booster MFIS lens-onlyAp. wheelvignettes	Speed Booster / focal-reducer family	Flange clearance is only -9.8 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount Nikon Z flange 16 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -11.8 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount Sony E (incl. FE) flange 18 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -9.8 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount Fujifilm X flange 17.7 mm	Speed booster MFIS lens-onlyAp. wheelvignettes	Speed Booster / focal-reducer family	Flange clearance is only -10.1 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount Fujifilm GFX (G-mount) flange 26.7 mm	Speed booster MFIS lens-onlyAp. wheel1.27× crop	Speed Booster / focal-reducer family	Flange clearance is only -1.1 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount Micro Four Thirds flange 19.25 mm	Speed booster MFIS lens-onlyAp. wheelvignettes	Speed Booster / focal-reducer family	Flange clearance is only -8.6 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount L-Mount flange 20 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -7.8 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount Canon RF (cine) flange 20 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -7.8 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.
Lens mount C-mount flange 17.526 mm	Speed booster MFIS lens-onlyAp. wheelvignettes	Speed Booster / focal-reducer family	Flange clearance is only -10.3 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required. Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies.

Adapter SKU teardown

Curated adapter SKUs that involve the Leica M mount on either side, with the operational specifics — body-side electronic contact count, firmware-update path, weather sealing, and whether optical glass is in the path.

Techart LM-EA9
released 2022
Leica M lens → Sony E (incl. FE) body
- 0 body-side contacts
- no firmware updates
- not weather sealed
- no glass — pass-through
- Mechanical-AF adapter: a 4.5 mm motorised tube physically extends the flange to drive autofocus on rangefinder-era M-mount lenses (and any other mechanically-coupled MF lens).
- AF speed is leisurely by design; brilliant for static or controlled-subject work, not for sports.
Voigtländer VM-E Close Focus
released 2015
Leica M lens → Sony E (incl. FE) body
- 0 body-side contacts
- no firmware updates
- not weather sealed
- no glass — pass-through
- Helicoid extends the rear flange to enable close focus past the lens's native minimum (typically 0.7 m on a 50mm Summicron → ~0.3 m).
- Build quality matches the M-system aesthetic; manual-focus by design.
Megadap MTZ11
released 2023
Leica M lens → Nikon Z body
- 11 body-side contacts
- firmware updatable
- not weather sealed
- no glass — pass-through
- Motorised mechanical-AF adapter: a 4.5 mm voice-coil tube physically extends the rear flange to drive autofocus on M-mount rangefinder glass — the Nikon-Z counterpart to Techart's LM-EA9 for Sony.
- Works with any M-mount lens (Leica, Voigtländer Cosina, Zeiss ZM, 7Artisans, TT Artisan) — the lens itself doesn't need to know it's being autofocused.
- USB-C firmware updatable. Eye-AF tracking works on Z6 II / Z7 II / Z8 / Z9 with the latest firmware. AF speed is unhurried by design — best for static or low-motion subjects.
Firmware history
1. v1.02023
  - Initial release — motorised AF on M-mount glass for Z6 II / Z7 II / Z8 / Z9
2. v2.02023
  - Eye-AF subject tracking polish on Z8 / Z9 with the latest body firmware
  - Focus search speed and overshoot tuning
3. v2.12024
  - Zf compatibility
  - Closer minimum-focus calibration (more usable close-focus throw on 35mm / 50mm Summicrons)
Approximate milestones — verify against the Megadap firmware page for the authoritative changelog.
Urth Leica M to Sony E
released 2020
Leica M lens → Sony E (incl. FE) body
- no firmware updates
- not weather sealed
- no glass — pass-through
- Leica M bayonet (Leica, Voigtländer VM, Zeiss ZM, Konica M-Hexanon, 7Artisans, TTArtisan, Light Lens Lab) onto Sony E with anodised recycled-aluminum body and plastic-free packaging.
- No close-focus helicoid (unlike Voigtländer's VM-E Close Focus) — focuses to the lens's native minimum, nothing closer. For AF on M-mount glass, look at the Techart LM-EA9 instead. Tree-planting commitment per product.
Novoflex EOSR/LEM
released 2019
Leica M lens → Canon RF body
- no firmware updates
- not weather sealed
- no glass — pass-through
- CNC-machined-in-Germany aluminum body, dual-screw bayonet retention, per-unit infinity-focus calibration with paper spec sheet. Leica M-mount glass (Leica, Voigtländer VM, Zeiss ZM, Konica M-Hexanon, 7Artisans) onto Canon RF bodies (R5 II / R5 / R6 II / R3 / R8 / R10).
- Mechanical-only — no AF, no electronic communication. Manual focus only with the RF body's focus peaking and magnify aids. The 20 mm RF flange + 27.8 mm M-mount flange leaves the adapter as a short, rigid ring (~8 mm thick).
- Lifetime warranty against manufacturing defects; the most expensive M → RF adapter on the market (~3-5× K&F / Urth equivalents).
7Artisans M-FE
released 2018
Leica M lens → Sony E (incl. FE) body
- no firmware updates
- not weather sealed
- no glass — pass-through
- Budget M-mount → Sony E mechanical adapter at sub-$30 — accessory to the 7Artisans manual-focus M-mount lens line (28 mm f/5.6, 35 mm f/2, 50 mm f/1.1, 75 mm f/1.25, M50 f/1.05).
- Looser bayonet tolerance than K&F Pro / Urth — adequate for casual use, not for high-frequency remounting of expensive Leica glass.
7Artisans M-NZ
released 2020
Leica M lens → Nikon Z body
- no firmware updates
- not weather sealed
- no glass — pass-through
- Budget M-mount → Nikon Z mechanical adapter at sub-$30 — accessory to the 7Artisans M-mount lens line. Z body's 16 mm flange leaves the adapter as a substantial barrel to bridge to the 27.8 mm M flange.
- Looser bayonet tolerance than K&F Pro / Urth — adequate for casual use. For AF on M-mount glass to Nikon Z, the Megadap MTZ11 is the only working choice.

References

https://en.wikipedia.org/wiki/Leica_M_mount

Common questions

Can Leica M lenses autofocus on a Sony E or Nikon Z body?: Only through the Techart LM-EA9 (Sony E) or Megadap MTZ11 (Nikon Z) autofocus adapters — both have an in-adapter floating element that micro-shifts the lens approximately 4.5 mm to drive AF on a lens that has no AF motor of its own. The result is single-shot AF with focus-acquisition speeds slower than a native AF lens, but usable for portraits and street work.
What's the difference between Leica M and Leica L (TL/SL) mount?: M is the rangefinder bayonet (1954, manual focus, 27.8 mm flange) used on M3, M6, M7, M10, M11 film and digital rangefinders. L is the autofocus mirrorless mount (2014, 20 mm flange) used on Leica SL / CL / TL bodies and shared with Panasonic and Sigma under the L-Mount Alliance. Leica's own M-to-L adapter mounts M lenses onto SL bodies with 6-bit lens detection preserved.
What's 6-bit lens coding on Leica M lenses?: A six-dot pattern Leica started milling onto the M-mount flange in 2006 (on lenses sold after that year) — the camera body reads it optically and writes the lens model into EXIF, applies lens-specific vignetting and colour correction, and selects the appropriate viewfinder framelines on M-series rangefinder bodies. Older lenses can be coded retroactively by Leica's service department or with after-market self-coding kits.

Mount specifications

Leica M on the flange-distance axis

Adapting Leica M lenses onto other bodies

Adapting other lenses onto a Leica M body

Adapter SKU teardown

Techart LM-EA9

Voigtländer VM-E Close Focus

Megadap MTZ11

Urth Leica M to Sony E

Novoflex EOSR/LEM

7Artisans M-FE

7Artisans M-NZ

References

Common questions

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