{"lens":{"id":"t-mount","displayName":"T-mount (T2)","manufacturer":"Various (Tamron-originated standard)","flangeDistanceMm":55,"electronicProtocol":"mechanical-only"},"body":{"id":"pentax-k","displayName":"Pentax K","manufacturer":"Pentax / Ricoh","flangeDistanceMm":45.46,"electronicProtocol":"Pentax K (KAF/KAF2/KAF3/KAF4)"},"compat":{"lensMountId":"t-mount","bodyMountId":"pentax-k","feasibility":"mechanical","af":"n/a","is":"n/a","aperture":"manual-ring","infinityFocus":"yes","adapterExamples":["generic mechanical adapter ring (multiple vendors)"],"caveats":["Mechanical adapter only — no electronic communication between T-mount (T2) lens and Pentax K body."],"formatNote":{"match":"match","lensFormat":"full-frame","bodyFormat":"full-frame","cropFactor":null,"message":"Lens image circle (full-frame) matches body sensor (full-frame) — no crop or vignetting concern."}}}