{"lens":{"id":"canon-ef","displayName":"Canon EF","manufacturer":"Canon","flangeDistanceMm":44,"electronicProtocol":"Canon EF"},"body":{"id":"sony-e","displayName":"Sony E (incl. FE)","manufacturer":"Sony","flangeDistanceMm":18,"electronicProtocol":"Sony E"},"compat":{"lensMountId":"canon-ef","bodyMountId":"sony-e","feasibility":"mechanical","af":"full","is":"full","aperture":"electronic","infinityFocus":"yes","adapterExamples":["Sigma MC-11 EF-E","Metabones EF-E Mark V","Viltrox EF-E5 / EF-NEX IV","Fringer EF-NZ (when paired with similar smart-EF adapters)"],"caveats":["AF speed and tracking depends on lens; Sigma's own EF lenses with MC-11 perform closest to native.","Some third-party EF lenses (Tamron, older Sigma) have known AF quirks — check per-lens compatibility lists.","IS on the lens is preserved; IBIS continues to work on body-stabilised Sony bodies."],"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."}}}