{"lens":{"id":"ef-cine","displayName":"Canon EF (cine)","manufacturer":"Canon","flangeDistanceMm":44,"electronicProtocol":"Canon EF"},"body":{"id":"canon-rf","displayName":"Canon RF","manufacturer":"Canon","flangeDistanceMm":20,"electronicProtocol":"Canon RF"},"compat":{"lensMountId":"ef-cine","bodyMountId":"canon-rf","feasibility":"mechanical","af":"manual-only","is":"n/a","aperture":"electronic","infinityFocus":"yes","adapterExamples":["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)"],"caveats":["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."],"formatNote":{"match":"match","lensFormat":"full-frame","bodyFormat":"full-frame","cropFactor":null,"message":"Lens image circle (full-frame) matches body sensor (full-frame) — no crop or vignetting concern."}}}