{"lens":{"id":"leica-m","displayName":"Leica M","manufacturer":"Leica","flangeDistanceMm":27.8,"electronicProtocol":"mechanical-only"},"body":{"id":"sony-e","displayName":"Sony E (incl. FE)","manufacturer":"Sony","flangeDistanceMm":18,"electronicProtocol":"Sony E"},"compat":{"lensMountId":"leica-m","bodyMountId":"sony-e","feasibility":"mechanical","af":"n/a","is":"n/a","aperture":"manual-ring","infinityFocus":"yes","adapterExamples":["Voigtländer VM-E Close Focus","Techart LM-EA9 (autofocus M adapter)","Generic M-NEX rings"],"caveats":["Manual focus by design; Techart LM-EA9 adds AF by mechanically extending the rear flange.","Wide M-mount lenses can show colour cast / smearing on the sensor edges; mitigated on later A7 generations."],"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."}}}