SMC Asahi Pentax-M 50mm f/1.7 Prime Lens K-Mount

This vintage manual focus Pentax M 50mm lens with SMC coatings. It has 6 elements in 5 groups, with a maximum aperture of f/1.7, a minimum of f/22, with half clicks through 16. It is a fast vintage lens that is popular to adapt to to modern digital cameras because of great contrast, sharp colors, and overall high ratings. It has a 6-blade diaphragm, takes 49 mm filters, and has a minimum focusing distance of 45 cm. The lens includes the original Asahi Optic Company rear cap, and a generic front cap. The metal body has some scuffs and scratches. While the glass has some specs of dust inside, overall it is very clean, with no scratches, haze, or fungus, or oil on the aperture blades.