Shown is the 35-200 Nikkor zoom on the M6. Leica never made a 200 to attach directly to its RF bodies, but you can with this adapter. The Pentax 42mm adapters have a ridge inside the adapter which stops down the lens, making the adapter usable on any make 42mm screw mount lens. Without that ridge, most non Pentax lenses without a stop down switch would not be usable since the aperture is spring loaded open. Unlike some screw mount adapters, this adapter does not interfere with the open aperture metering lug on the rear of Fujica screw mount lenses.
All adapters are new, with zero glass elements to degrade image quality.
Adapters allow metering on the M6, M5, CL and CLE and, of course infinity focusing. Lenses are not rangefinder coupled, you focus by scale focusing. With the immense depth of field of wide angle lenses, scale focusing is easy. Leica screw mount on special order. I try to keep the M adapters in stock.