Will Canon EF full-frame lenses cover the GFX 44×33 mm sensor?

Most don't — the GFX sensor's 55 mm image-circle diagonal exceeds most full-frame lenses' 43.3 mm coverage. The Fringer EF-GFX adapter mounts EF glass with AF, but most lenses vignette heavily outside the central crop. Tilt-shift EF lenses (Canon TS-E 17 mm f/4L, TS-E 24 mm f/3.5L II) and the Sigma 50 mm f/1.4 Art are the notable exceptions that cover most of the GFX frame.

Can I use Hasselblad V-system lenses on a GFX body?

Yes — V-to-GFX adapters (Fotodiox Pro, Mirex, Kipon) accept all C / CF / CFi / CFE Zeiss lenses for the Hasselblad 500-series. No electronic communication (Hasselblad V is fully mechanical), so aperture is set on the lens and focus is manual. Image circle covers GFX easily because Hasselblad V was designed for 6×6 cm film, far larger than GFX's 44×33 mm sensor.

How does GFX's flange depth compare to other medium-format systems?

At 26.7 mm, GFX has the shallowest flange of any medium-format mount — far shorter than Pentax 645 (~70 mm), Hasselblad V (74.9 mm), or Mamiya 645 (63.3 mm). The short flange is what enables compact GFX bodies (GFX 100 II, GFX 50S II, GFX 100S II) and what makes adapting legacy medium-format SLR glass onto GFX bodies almost universally feasible with a simple mechanical adapter.

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

Fujifilm GFX (G-mount) on the flange-distance axis

Fujifilm GFX (G-mount) sits at 26.7 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 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 mount	Result	Adapter examples	Caveats
Body mount 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.
Body mount 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.
Body mount 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.
Body mount 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.
Body mount 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.
Body mount 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.
Body mount 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.
Body mount 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.
Body mount 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.
Body mount 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.	Speed Booster equivalence calculator Plug in any Fujifilm GFX (G-mount) lens and pick the focal-reducer family. The calc returns the effective focal length and aperture on a Leica M (APS-C), 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 53.3 mm 35.5 mm × 1.5× (APS-C 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 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 mount	Result	Adapter examples	Caveats
Lens mount 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.
Lens mount Canon EF-S flange 44 mm	Mechanical AF partialIS lens-onlyAp. electronicvignettes	Fringer EF-GFX Pro Steelsring EF-GFX	Electronics pass through (AF on a curated lens list, electronic aperture), but an EF-S lens's APS-C image circle is far smaller than the 44×33 mm GFX sensor — usable only in a heavy central crop, so this pairing is of limited practical value. Prefer full-frame EF glass for GFX; EF-S is mechanically possible but optically wasteful here.
Lens mount Canon FD flange 42 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Canon FD lens and Fujifilm GFX (G-mount) body.
Lens mount 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.
Lens mount 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.
Lens mount M42 (Pentax / Praktica screw mount) flange 45.46 mm	Mechanical MFno ISAp. 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.
Lens mount 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.
Lens mount PL (Positive Lock) flange 52 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between PL (Positive Lock) lens and Fujifilm GFX (G-mount) body.
Lens mount Canon EF (cine) flange 44 mm	Mechanical MFno ISAp. 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.
Lens mount Exakta flange 44.7 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Exakta lens and Fujifilm GFX (G-mount) body.
Lens mount T-mount (T2) flange 55 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between T-mount (T2) lens and Fujifilm GFX (G-mount) body.
Lens mount Praktica B flange 44.4 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Praktica B lens and Fujifilm GFX (G-mount) body.
Lens mount Konica AR flange 40.5 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Konica AR lens and Fujifilm GFX (G-mount) body.
Lens mount Minolta SR / MC / MD flange 43.5 mm	Mechanical MFno ISAp. 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.
Lens mount Olympus OM flange 46 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Olympus OM lens and Fujifilm GFX (G-mount) body.
Lens mount Contax/Yashica (C/Y) flange 45.5 mm	Mechanical MFno ISAp. ringvignettes	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Contax/Yashica (C/Y) lens and Fujifilm GFX (G-mount) body.
Lens mount 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.
Lens mount 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.
Lens mount 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.
Lens mount 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.
Lens mount 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.
Lens mount 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.
Lens mount 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.
Lens mount 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.
Lens mount 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.
Lens mount 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.
Firmware history
1. v1.002019
  - Initial release — Sigma Art + Canon EF L on GFX 50S / 50R with phase-detect AF
2. v1.202020
  - GFX 100 / 100S subject tracking refinements
  - Additional Canon EF lens compatibility entries
3. v1.502023
  - GFX 100 II compatibility and Eye-AF stability improvements
  - Tamron G2 lens entries
Approximate milestones — verify against the Fringer firmware page for the authoritative changelog.
Kipon T/S Nikon F-GFX
released 2018
Nikon F lens → Fujifilm GFX (G-mount) body
- no firmware updates
- not weather sealed
- no glass — pass-through
- Mechanical tilt-shift adapter: ±10° tilt and ±15 mm shift between a Nikon F-mount lens and a Fujifilm GFX 44×33 mm sensor body. Useful for architectural correction or selective-focus work without buying a dedicated PC-Nikkor lens.
- Mechanical-only — no AF, no aperture pass-through. F-mount lens aperture handled by the lens ring (AI / AI-S / AF-D) or the adapter's built-in stop-down ring (G-type Nikkors).
- Lens-side image circle must cover the 44×33 mm GFX sensor when shifted — most Nikon F primes (AI 50 / 35 / 24, AF-D 85, Sigma Art F-mount) cover with limited shift; PC-Nikkor lenses cover with full shift.

References

https://en.wikipedia.org/wiki/Fujifilm_G-mount

Common questions

Will Canon EF full-frame lenses cover the GFX 44×33 mm sensor?: Most don't — the GFX sensor's 55 mm image-circle diagonal exceeds most full-frame lenses' 43.3 mm coverage. The Fringer EF-GFX adapter mounts EF glass with AF, but most lenses vignette heavily outside the central crop. Tilt-shift EF lenses (Canon TS-E 17 mm f/4L, TS-E 24 mm f/3.5L II) and the Sigma 50 mm f/1.4 Art are the notable exceptions that cover most of the GFX frame.
Can I use Hasselblad V-system lenses on a GFX body?: Yes — V-to-GFX adapters (Fotodiox Pro, Mirex, Kipon) accept all C / CF / CFi / CFE Zeiss lenses for the Hasselblad 500-series. No electronic communication (Hasselblad V is fully mechanical), so aperture is set on the lens and focus is manual. Image circle covers GFX easily because Hasselblad V was designed for 6×6 cm film, far larger than GFX's 44×33 mm sensor.
How does GFX's flange depth compare to other medium-format systems?: At 26.7 mm, GFX has the shallowest flange of any medium-format mount — far shorter than Pentax 645 (~70 mm), Hasselblad V (74.9 mm), or Mamiya 645 (63.3 mm). The short flange is what enables compact GFX bodies (GFX 100 II, GFX 50S II, GFX 100S II) and what makes adapting legacy medium-format SLR glass onto GFX bodies almost universally feasible with a simple mechanical adapter.