Asahi SMC Pentax-M 28mm F3.5 lens with case cap filter

This is a vintage Asahi Optical SMC Pentax-M 28mm F3.5 lens with original case, original rear end cap, and 49mm Hoya Skylight 1B filter. It was made in Japan. The lens is in great shape, and the glass has no scratches, fungus, haze. There is some light dust specks that you can see with a light, but nothing that would affect image quality. The case is in fair condition. The HOYA filter has no scratches and a couple of tiny dings on the edge, but the threads on the lens are perfect, and the body has only light wear. Focus is smooth and the aperture works fine and clicks. This is a popular vintage lens for adapting to modern digital camera, both DSLR and mirrorless. In reviews it grades high for sharpness, and for a 28mm, has very good bokeh.