{"lens":{"id":"c-mount","displayName":"C-mount","manufacturer":"Various (cine / industrial standard)","flangeDistanceMm":17.526,"electronicProtocol":"mechanical-only"},"body":{"id":"micro-four-thirds","displayName":"Micro Four Thirds","manufacturer":"Olympus / OM System / Panasonic","flangeDistanceMm":19.25,"electronicProtocol":"Micro Four Thirds"},"compat":{"lensMountId":"c-mount","bodyMountId":"micro-four-thirds","feasibility":"mechanical","af":"n/a","is":"n/a","aperture":"manual-ring","infinityFocus":"requires-correction","adapterExamples":["Generic C-MFT thin spacer (Fotodiox, Rainbowimaging, Kipon)"],"caveats":["C-mount flange is 17.526 mm vs MFT's 19.25 mm — adapter is a thin 1.7 mm spacer. Most C-mount lenses focus past infinity through such an adapter; check per-lens.","Image circle is sized for 16 mm cine film (~13 mm diagonal). Only a handful of fast cine primes (Cosmicar / Pentax 25 mm f/1.4, Fujian 35 mm f/1.7) cover the MFT sensor; most others vignette into a tight central circle."],"formatNote":{"match":"lens-smaller-than-body","lensFormat":"16mm-cine","bodyFormat":"MFT","cropFactor":null,"message":"Lens image circle (16mm-cine) is smaller than body sensor (MFT) — expect heavy vignetting or black corners. Many bodies auto-crop to the smaller format and drop resolution accordingly."}}}