{"lens":{"id":"canon-ef-m","displayName":"Canon EF-M","manufacturer":"Canon","flangeDistanceMm":18,"electronicProtocol":"Canon EF-M"},"body":{"id":"fujifilm-x","displayName":"Fujifilm X","manufacturer":"Fujifilm","flangeDistanceMm":17.7,"electronicProtocol":"Fujifilm X"},"compat":{"lensMountId":"canon-ef-m","bodyMountId":"fujifilm-x","feasibility":"requires-glass","af":"manual-only","is":"lens-only","aperture":"adapter-wheel","infinityFocus":"requires-correction","adapterExamples":["Speed Booster / focal-reducer family"],"caveats":["Flange clearance is only 0.3 mm — a plain mechanical adapter cannot reach infinity focus; a focal reducer (Speed Booster) with optical glass is required.","Speed Boosters typically widen the effective focal length (~0.71×) and add ~1 stop of light, which can be desirable on crop bodies."],"formatNote":{"match":"match","lensFormat":"APS-C","bodyFormat":"APS-C","cropFactor":null,"message":"Lens image circle (APS-C) matches body sensor (APS-C) — no crop or vignetting concern."}}}