{"lens":{"id":"ef-cine","displayName":"Canon EF (cine)","manufacturer":"Canon","flangeDistanceMm":44,"electronicProtocol":"Canon EF"},"body":{"id":"l-mount","displayName":"L-Mount","manufacturer":"Leica / Panasonic / Sigma","flangeDistanceMm":20,"electronicProtocol":"L-Mount"},"compat":{"lensMountId":"ef-cine","bodyMountId":"l-mount","feasibility":"mechanical","af":"manual-only","is":"n/a","aperture":"electronic","infinityFocus":"yes","adapterExamples":["Sigma MC-21 EF-L (Canon EF / Sigma SA → L-mount)"],"caveats":["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."],"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."}}}