{"lens":{"id":"canon-ef","displayName":"Canon EF","manufacturer":"Canon","flangeDistanceMm":44,"electronicProtocol":"Canon EF"},"body":{"id":"nikon-z","displayName":"Nikon Z","manufacturer":"Nikon","flangeDistanceMm":16,"electronicProtocol":"Nikon Z"},"compat":{"lensMountId":"canon-ef","bodyMountId":"nikon-z","feasibility":"mechanical","af":"partial","is":"full","aperture":"electronic","infinityFocus":"yes","adapterExamples":["Fringer EF-NZ II"],"caveats":["EF is a fully electronic mount with no aperture ring — a glassless mechanical ring leaves the diaphragm stuck wide open and gives no AF. The path that works is the electronic Fringer EF-NZ II (FR-NZ2), which drives AF, electronic aperture, optical IS, and EXIF passthrough.","Single-shot AF is close to native; continuous-AF and high-burst tracking run a notch behind native Z glass and can be firmware-dependent. No screw-drive EF lenses exist — all EF AF runs through the in-lens motor.","No first-party EF → Z adapter exists (Nikon's FTZ is F-mount-to-Z only) and the third-party EF → Z ecosystem is younger and thinner than EF → Sony E — check Fringer's per-lens compatibility chart before buying."],"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."}}}