{"lens":{"id":"sony-a","displayName":"Sony A / Minolta A","manufacturer":"Sony / Minolta","flangeDistanceMm":44.5,"electronicProtocol":"Sony/Minolta A (SSM/SAM)"},"body":{"id":"leica-m","displayName":"Leica M","manufacturer":"Leica","flangeDistanceMm":27.8,"electronicProtocol":"mechanical-only"},"compat":{"lensMountId":"sony-a","bodyMountId":"leica-m","feasibility":"mechanical","af":"manual-only","is":"lens-only","aperture":"adapter-wheel","infinityFocus":"yes","adapterExamples":["generic mechanical adapter ring (multiple vendors)"],"caveats":["Mechanical adapter only — no electronic communication between Sony A / Minolta A lens and Leica M body.","Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel."],"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."}}}