{"lens":{"id":"fujifilm-gfx","displayName":"Fujifilm GFX (G-mount)","manufacturer":"Fujifilm","flangeDistanceMm":26.7,"electronicProtocol":"Fujifilm G"},"body":{"id":"l-mount","displayName":"L-Mount","manufacturer":"Leica / Panasonic / Sigma","flangeDistanceMm":20,"electronicProtocol":"L-Mount"},"compat":{"lensMountId":"fujifilm-gfx","bodyMountId":"l-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 Fujifilm GFX (G-mount) lens and L-Mount body.","Lens has no aperture ring; choose an adapter with a built-in aperture-control wheel."],"formatNote":{"match":"lens-larger-than-body","lensFormat":"medium-format","bodyFormat":"full-frame","cropFactor":1.27,"message":"Lens covers medium-format; body is full-frame — 1.27× crop factor applies relative to the lens's native image circle. No vignetting; the body uses the centre of the lens."}}}