Canon · Cinema mount

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

Cinema variant of the Canon EF mount used by Canon CN-E primes and zooms and by the C300 / C500 / C70 (in EF mode) cinema bodies. Mechanically and electronically identical to stills EF — same 44 mm flange, same 54 mm throat, same 8-pin EF protocol — but with a reinforced stainless-steel collar, 0.8 MOD cine-gear-cut focus and iris rings, geared follow-focus throws of 300°+, and parfocal zoom design. CN-E primes carry the EF electronic aperture but no AF motor; AF is by design absent because cine workflows pull focus manually via follow-focus or wireless FIZ.

Mount specifications

Flange focal distance: 44 mm
Throat diameter: 54 mm
Electronic protocol: Canon EF
Supported formats: full-frame, APS-H, APS-C
Manufacturer: Canon
Introduced: 2011
Status: Active production

Adapting Canon EF (cine) lenses onto other bodies

You own Canon EF (cine) 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
Canon EF flange 44 mm	Native MF—Ap. electronic	no adapter required — EF-cine glass mounts natively on EF bodies	EF-cine lenses are mechanically and electronically the EF mount with a reinforced collar and cine-geared rings — they mount native on every EF body. Canon CN-E primes carry electronic aperture but no AF motor; iris is body-controlled, focus is fully manual by design.
Canon RF flange 20 mm	Mechanical MF—Ap. electronic	Canon EF-EOS R (plain) — works for any EF-cine prime or zoom Canon EF-EOS R 0.71× Cinema Speed Booster (Super 35-to-full-frame relay, designed for Canon EF-cine on C70's S35 sensor — note: the C70 itself is S35, but full-frame R5/R5 C also accept this adapter on the EF-cine glass)	Mechanically identical to mounting any EF lens on an RF body — the 24 mm EF-EOS R adapter preserves electronic aperture and is fully transparent. AF stays manual-only because the cine lens has no AF motor; iris control is body-driven via the EF pins.
Canon EF-M flange 18 mm	Mechanical MF—Ap. electronic1.5× crop	Canon EF-EOS M	1.6× crop applies on every M-system body. Cine prime keeps electronic aperture; AF is moot.
Nikon Z flange 16 mm	Mechanical MFIS lens-onlyAp. wheel	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Canon EF (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 MF—Ap. electronic	Sigma MC-11 EF-E (electronic aperture pass-through) Metabones EF-E Mark V Viltrox EF-E5 / EF-NEX IV	Smart EF adapters pass aperture commands through to the EF-cine lens iris — useful for setting T-stops electronically on a Sony FX body. No AF (cine prime has no AF motor); follow-focus or wireless FIZ controls focus manually.
Fujifilm X flange 17.7 mm	Mechanical MF—Ap. electronic1.5× crop	Fringer EF-FX Pro II Fringer EF-FX2	1.5× crop applies — a 50 mm EF-cine prime becomes a ~75 mm equivalent on X-Trans. Aperture pass-through works; AF is moot (cine prime has no motor).
Fujifilm GFX (G-mount) flange 26.7 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.
Micro Four Thirds flange 19.25 mm	Mechanical MFIS lens-onlyAp. wheel2× crop	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Canon EF (cine) 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 MF—Ap. electronic	Sigma MC-21 EF-L (Canon EF / Sigma SA → L-mount)	MC-21 transmits electronic aperture commands from a Panasonic / Sigma / Leica L-mount cinema body to the EF-cine iris. Focus stays fully manual; cinema bodies pulling focus via Servo or wireless FIZ work as expected.
Leica M flange 27.8 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.
Canon RF (cine) flange 20 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.
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 EF (cine) lens and C-mount body. Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Konica AR flange 40.5 mm	Mechanical MFIS lens-onlyAp. wheel	generic mechanical adapter ring (multiple vendors)	Mechanical adapter only — no electronic communication between Canon EF (cine) lens and Konica AR body. Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel.
Canon EF-S flange 44 mm	Speed booster MFIS lens-onlyAp. wheel1.5× crop	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.
Nikon F flange 46.5 mm	Speed booster MFIS lens-onlyAp. wheel	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.
Sony A / Minolta A flange 44.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -0.5 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.
M42 (Pentax / Praktica screw mount) flange 45.46 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -1.5 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.
Pentax K flange 45.46 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -1.5 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.
PL (Positive Lock) flange 52 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -8.0 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.
Exakta flange 44.7 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -0.7 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.
T-mount (T2) flange 55 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -11.0 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.
Praktica B flange 44.4 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -0.4 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.
Minolta SR / MC / MD flange 43.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 0.5 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.

Adapting other lenses onto a Canon EF (cine) body

You own a Canon EF (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 mount	Result	Adapter examples	Caveats
Canon EF flange 44 mm	Native AF fullIS fullAp. electronic	no adapter required — stills EF glass mounts natively on Canon EF-mount cinema bodies (C200, C300 Mk II, C500 Mk II in EF mode)	Cinema EF bodies expose every stills-EF feature: full AF (where the lens supports it), in-lens IS, and electronic aperture. Servo zoom control (4-pin Servo connector on Canon's cine zooms) is not supported by stills EF lenses — irrelevant for primes.
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 EF (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 EF (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 EF (cine) body.
Canon EF-S flange 44 mm	Speed booster MFIS lens-onlyAp. wheelvignettes	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.
Sony A / Minolta A flange 44.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 0.5 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.
M42 (Pentax / Praktica screw mount) flange 45.46 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 1.5 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.
Pentax K flange 45.46 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 1.5 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.
Exakta flange 44.7 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 0.7 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.
Praktica B flange 44.4 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only 0.4 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.
Konica AR flange 40.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -3.5 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.
Minolta SR / MC / MD flange 43.5 mm	Speed booster MFIS lens-onlyAp. wheel	Speed Booster / focal-reducer family	Flange clearance is only -0.5 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.

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

Mount specifications

Adapting Canon EF (cine) lenses onto other bodies

Adapting other lenses onto a Canon EF (cine) body

References

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