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Fujifilm · Medium-format mirrorless mount

Fujifilm GFX (G-mount) — flange distance, protocol, and adapter compatibility

Fujifilm's medium-format (44 × 33 mm sensor) mirrorless mount. 65 mm throat covers the larger image circle; 26.7 mm flange leaves room for adapting medium-format SLR lenses (Pentax 645, Hasselblad V, Mamiya 645). Smart adapters add EF compatibility but image circle limits use to the central crop on most full-frame lenses.

Mount specifications

Flange focal distance
26.7 mm
Throat diameter
65 mm
Electronic protocol
Fujifilm G
Supported formats
medium-format
Manufacturer
Fujifilm
Introduced
2017
Status
Active production

Adapting Fujifilm GFX (G-mount) lenses onto other bodies

You own Fujifilm GFX (G-mount) glass and want to mount it on a body with a different lens mount. Rows are sorted by feasibility.

Body mountResultAdapter examplesCaveats
Canon RF
flange 20 mm
Mechanical
MFIS lens-onlyAp. wheel1.27× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and Canon RF body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Canon EF-M
flange 18 mm
Mechanical
MFIS lens-onlyAp. wheel1.9× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and Canon EF-M body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Nikon Z
flange 16 mm
Mechanical
MFIS lens-onlyAp. wheel1.27× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and Nikon Z body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Sony E (incl. FE)
flange 18 mm
Mechanical
MFIS lens-onlyAp. wheel1.27× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and Sony E (incl. FE) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Fujifilm X
flange 17.7 mm
Mechanical
MFIS lens-onlyAp. wheel1.9× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and Fujifilm X body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Micro Four Thirds
flange 19.25 mm
Mechanical
MFIS lens-onlyAp. wheel2.53× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and Micro Four Thirds body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
L-Mount
flange 20 mm
Mechanical
MFIS lens-onlyAp. wheel1.27× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and L-Mount body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Canon RF (cine)
flange 20 mm
Mechanical
MFIS lens-onlyAp. wheel1.27× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and Canon RF (cine) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
C-mount
flange 17.526 mm
Mechanical
MFIS lens-onlyAp. wheel3.42× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Fujifilm GFX (G-mount) lens and C-mount body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Leica M
flange 27.8 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.

Adapting other lenses onto a Fujifilm GFX (G-mount) body

You own a Fujifilm GFX (G-mount) 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 mountResultAdapter examplesCaveats
Canon EF
flange 44 mm
Mechanical
AF partialIS lens-onlyAp. electronicvignettes
  • Fringer EF-GFX Pro
  • Steelsring EF-GFX
  • Image circle of EF lenses may vignette on the 44×33 mm GFX sensor — many users crop to 35 mm capture mode.
  • AF preserved on a curated list of EF lenses; check the adapter maker's compatibility chart.
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 Fujifilm GFX (G-mount) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Nikon F
flange 46.5 mm
Mechanical
MFIS lens-onlyAp. wheelvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Nikon F lens and Fujifilm GFX (G-mount) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Sony A / Minolta A
flange 44.5 mm
Mechanical
MFIS lens-onlyAp. wheelvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Sony A / Minolta A lens and Fujifilm GFX (G-mount) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
M42 (Pentax / Praktica screw mount)
flange 45.46 mm
Mechanical
MFIS lens-onlyAp. ringvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between M42 (Pentax / Praktica screw mount) lens and Fujifilm GFX (G-mount) body.
Pentax K
flange 45.46 mm
Mechanical
MFIS lens-onlyAp. wheelvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Pentax K lens and Fujifilm GFX (G-mount) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
PL (Positive Lock)
flange 52 mm
Mechanical
MFIS lens-onlyAp. ringvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between PL (Positive Lock) lens and Fujifilm GFX (G-mount) body.
Canon EF (cine)
flange 44 mm
Mechanical
MF—Ap. electronicvignettes
  • Fringer EF-GFX Pro
  • Steelsring EF-GFX
  • EF image circle vignettes on the 44×33 mm GFX sensor — most users crop to 35 mm capture mode.
  • Aperture commands transmit electronically; focus is fully manual.
Exakta
flange 44.7 mm
Mechanical
MFIS lens-onlyAp. ringvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Exakta lens and Fujifilm GFX (G-mount) body.
T-mount (T2)
flange 55 mm
Mechanical
MFIS lens-onlyAp. ringvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between T-mount (T2) lens and Fujifilm GFX (G-mount) body.
Praktica B
flange 44.4 mm
Mechanical
MFIS lens-onlyAp. ringvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Praktica B lens and Fujifilm GFX (G-mount) body.
Konica AR
flange 40.5 mm
Mechanical
MFIS lens-onlyAp. ringvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Konica AR lens and Fujifilm GFX (G-mount) body.
Minolta SR / MC / MD
flange 43.5 mm
Mechanical
MFIS lens-onlyAp. ringvignettes
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Minolta SR / MC / MD lens and Fujifilm GFX (G-mount) body.
Canon RF
flange 20 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -6.7 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.
Canon EF-M
flange 18 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -8.7 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.
Nikon Z
flange 16 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -10.7 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.
Sony E (incl. FE)
flange 18 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -8.7 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.
Fujifilm X
flange 17.7 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -9.0 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.
Micro Four Thirds
flange 19.25 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -7.4 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.
L-Mount
flange 20 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -6.7 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.
Leica M
flange 27.8 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.
Canon RF (cine)
flange 20 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -6.7 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.
C-mount
flange 17.526 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -9.2 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 Fujifilm GFX (G-mount) 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.

  • Fringer EF-GFX Pro

    released 2019

    Canon EF lens → Fujifilm GFX (G-mount) body

    • 9 body-side contacts
    • firmware updatable
    • not weather sealed
    • no glass — pass-through
    • Brings EF lenses onto Fuji GFX medium-format bodies with AF on a curated list. Image circle of EF lenses may vignette on the 44×33 mm sensor — users often crop to 35 mm capture mode.
    • Firmware-updatable via USB to track new EF lens releases.

References

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