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Canon · Cinema mount

Canon RF (cine) — flange distance, protocol, and adapter compatibility

Cinema variant of the Canon RF mount introduced with the EOS C70 in 2020 and adopted by the C400 / R5 C and the RF-mount CN-R prime line. Mechanically and electronically identical to stills RF — same 20 mm flange, same 54 mm throat, same 12-pin RF protocol — but with cine-grade gearing (0.8 MOD focus / iris / zoom rings), reinforced collar, parfocal zoom design, and manual-focus-first ergonomics. RF-cine glass mounts natively on every RF body (stills R5 / R6, cinema C70 / C400 / R5 C) and accepts the same EF-EOS R adapter family for legacy EF cine glass.

Mount specifications

Flange focal distance
20 mm
Throat diameter
54 mm
Electronic protocol
Canon RF
Supported formats
full-frame, APS-C
Manufacturer
Canon
Introduced
2020
Status
Active production

Adapting Canon RF (cine) lenses onto other bodies

You own Canon RF (cine) 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
Native
MF—Ap. electronic
  • no adapter required — RF-cine glass mounts natively on every RF body
  • RF-cine lenses are mechanically and electronically stills RF with a cine-geared barrel — they mount native on R5, R6, R3, C70, C400, R5 C, etc.
  • Canon CN-R primes carry electronic aperture but no AF motor; iris is body-controlled, focus is fully manual via 0.8 MOD geared ring.
Canon EF-M
flange 18 mm
Mechanical
MFIS lens-onlyAp. wheel1.5× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Canon RF (cine) 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. wheel
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Canon RF (cine) 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. wheel
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Canon RF (cine) 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. wheel1.5× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Canon RF (cine) lens and Fujifilm X 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. wheel2.7× crop
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Canon RF (cine) lens and C-mount body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Fujifilm GFX (G-mount)
flange 26.7 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.
Micro Four Thirds
flange 19.25 mm
Speed booster
MFIS lens-onlyAp. wheel2× crop
  • Speed Booster / focal-reducer family
  • Flange clearance is only 0.8 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.
L-Mount
flange 20 mm
Speed booster
MFIS lens-onlyAp. wheel
  • Speed Booster / focal-reducer family
  • Flange clearance is only 0.0 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.
Leica M
flange 27.8 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.

Adapting other lenses onto a Canon RF (cine) body

You own a Canon RF (cine) 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 RF
flange 20 mm
Native
AF fullIS fullAp. electronic
  • no adapter required — stills RF glass mounts natively on Canon RF-mount cinema bodies (C70, C400, R5 C)
  • Cinema RF bodies preserve every stills-RF feature: Dual Pixel CMOS AF II, in-lens IS, electronic aperture and Control Ring.
  • C70 and C400 use the standard RF mount; no special adapter is needed for RF-mount L-series stills lenses.
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 Canon RF (cine) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
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 Canon RF (cine) 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. wheel
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Nikon F lens and Canon RF (cine) 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. wheel
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Sony A / Minolta A lens and Canon RF (cine) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Fujifilm GFX (G-mount)
flange 26.7 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.
M42 (Pentax / Praktica screw mount)
flange 45.46 mm
Mechanical
MFIS lens-onlyAp. ring
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between M42 (Pentax / Praktica screw mount) lens and Canon RF (cine) body.
Leica M
flange 27.8 mm
Mechanical
MFIS lens-onlyAp. ring
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Leica M lens and Canon RF (cine) body.
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 Canon RF (cine) 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. ring
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between PL (Positive Lock) lens and Canon RF (cine) body.
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 Canon RF (cine) body.
  • Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Exakta
flange 44.7 mm
Mechanical
MFIS lens-onlyAp. ring
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Exakta lens and Canon RF (cine) body.
T-mount (T2)
flange 55 mm
Mechanical
MFIS lens-onlyAp. ring
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between T-mount (T2) lens and Canon RF (cine) body.
Praktica B
flange 44.4 mm
Mechanical
MFIS lens-onlyAp. ring
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Praktica B lens and Canon RF (cine) body.
Konica AR
flange 40.5 mm
Mechanical
MFIS lens-onlyAp. ring
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Konica AR lens and Canon RF (cine) body.
Minolta SR / MC / MD
flange 43.5 mm
Mechanical
MFIS lens-onlyAp. ring
  • generic mechanical adapter ring (multiple vendors)
  • Mechanical adapter only — no electronic communication between Minolta SR / MC / MD lens and Canon RF (cine) body.
C-mount
flange 17.526 mm
Speed booster
MFIS lens-onlyAp. wheelvignettes
  • Speed Booster / focal-reducer family
  • Flange clearance is only -2.5 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.

References

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