Rainbowimaging 6 Bit (screw-in) Leica M39 LSM LTM 50-75 50mm - 75mm lens to Leica M Adapter, fits M240 M9 M8 M7 M6 M6 M5 M4 M3 M2 Cameras This 6 Bit lens adapter allows (50mm - 75mm) Leica SM / M39 lens to fit onto all Leica M mount cameras. 6 Bit Code Fits LSM M39 lens (50mm - 75mm) & Leica M cameras