{"lens":{"id":"nikon-f","displayName":"Nikon F","manufacturer":"Nikon","flangeDistanceMm":46.5,"electronicProtocol":"Nikon F (AI/AI-S/AF/AF-D/AF-S/AF-P)"},"body":{"id":"canon-ef-m","displayName":"Canon EF-M","manufacturer":"Canon","flangeDistanceMm":18,"electronicProtocol":"Canon EF-M"},"compat":{"lensMountId":"nikon-f","bodyMountId":"canon-ef-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 Nikon F lens and Canon EF-M body.","Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel."],"formatNote":{"match":"lens-larger-than-body","lensFormat":"full-frame","bodyFormat":"APS-C","cropFactor":1.5,"message":"Lens covers full-frame; body is APS-C — 1.5× crop factor applies relative to the lens's native image circle. No vignetting; the body uses the centre of the lens."}}}