{"lens":{"id":"canon-ef","displayName":"Canon EF","manufacturer":"Canon","flangeDistanceMm":44,"electronicProtocol":"Canon EF"},"body":{"id":"fujifilm-gfx","displayName":"Fujifilm GFX (G-mount)","manufacturer":"Fujifilm","flangeDistanceMm":26.7,"electronicProtocol":"Fujifilm G"},"compat":{"lensMountId":"canon-ef","bodyMountId":"fujifilm-gfx","feasibility":"mechanical","af":"partial","is":"lens-only","aperture":"electronic","infinityFocus":"yes","adapterExamples":["Fringer EF-GFX Pro","Steelsring EF-GFX"],"caveats":["Image circle of EF lenses may vignette on the 44×33 mm GFX sensor — many users crop to 35 mm capture mode.","AF preserved on a curated list of EF lenses; check the adapter maker's compatibility chart."],"formatNote":{"match":"lens-smaller-than-body","lensFormat":"full-frame","bodyFormat":"medium-format","cropFactor":null,"message":"Lens image circle (full-frame) is smaller than body sensor (medium-format) — expect heavy vignetting or black corners. Many bodies auto-crop to the smaller format and drop resolution accordingly."}}}