Leitz Leica screw-to-M bayonet lens adapter 35mm/135mm, made in Wetzlar Germany
Original E. Leitz, Wetzlar, Germany Leica-made screw-to-bayonet M lens adapter for 35mm or 135mm lenses.
With 35mm screw-mount lenses, this adapter will activate the 35mm frame on all Leica M cameras that have a built-in 35mm frameline, such as the Leica M2, M4, M5, M6, M7, M8, M9, MP, etc.
With 135mm screw-mount lenses, this adapter will activate the 135mm frame on all Leica M cameras that have a built-in 135mm frameline, such as the Leica M3.