{"lens":{"id":"canon-ef","displayName":"Canon EF","manufacturer":"Canon","flangeDistanceMm":44,"electronicProtocol":"Canon EF"},"body":{"id":"fujifilm-x","displayName":"Fujifilm X","manufacturer":"Fujifilm","flangeDistanceMm":17.7,"electronicProtocol":"Fujifilm X"},"compat":{"lensMountId":"canon-ef","bodyMountId":"fujifilm-x","feasibility":"mechanical","af":"full","is":"full","aperture":"electronic","infinityFocus":"yes","adapterExamples":["Fringer EF-FX Pro II","Fringer EF-FX2"],"caveats":["Fringer covers most modern Canon EF lenses with phase-detect AF on X-Trans bodies.","1.5× crop applies (X-mount is APS-C)."],"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."}}}