{"lens":{"id":"canon-ef","displayName":"Canon EF","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":"canon-ef","bodyMountId":"l-mount","feasibility":"mechanical","af":"full","is":"full","aperture":"electronic","infinityFocus":"yes","adapterExamples":["Sigma MC-21 EF-L"],"caveats":["MC-21 has the best AF coverage with Sigma's own EF lenses; Canon-brand EF lens support varies by model.","Tamron and some older third-party EF lenses are not officially supported."],"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."}}}