{"lens":{"id":"canon-ef-s","displayName":"Canon EF-S","manufacturer":"Canon","flangeDistanceMm":44,"electronicProtocol":"Canon EF"},"body":{"id":"c-mount","displayName":"C-mount","manufacturer":"Various (cine / industrial standard)","flangeDistanceMm":17.526,"electronicProtocol":"mechanical-only"},"compat":{"lensMountId":"canon-ef-s","bodyMountId":"c-mount","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 Canon EF-S lens and C-mount body.","Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel."],"formatNote":{"match":"lens-larger-than-body","lensFormat":"APS-C","bodyFormat":"16mm-cine","cropFactor":1.8,"message":"Lens covers APS-C; body is 16mm-cine — 1.8× crop factor applies relative to the lens's native image circle. No vignetting; the body uses the centre of the lens."}}}