{"lens":{"id":"exakta","displayName":"Exakta","manufacturer":"Ihagee Dresden","flangeDistanceMm":44.7,"electronicProtocol":"mechanical-only"},"body":{"id":"nikon-z","displayName":"Nikon Z","manufacturer":"Nikon","flangeDistanceMm":16,"electronicProtocol":"Nikon Z"},"compat":{"lensMountId":"exakta","bodyMountId":"nikon-z","feasibility":"mechanical","af":"n/a","is":"n/a","aperture":"manual-ring","infinityFocus":"yes","adapterExamples":["generic mechanical adapter ring (multiple vendors)"],"caveats":["Mechanical adapter only — no electronic communication between Exakta lens and Nikon Z body."],"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."}}}