This vintage Japan Asanuma Auto-Tele camera lens is a high-quality telephoto lens with a maximum aperture of f/3.5 and a focal length of 200mm. It is compatible with M42 screw mount cameras, including Pentax, and has a mount size of M42. The lens has a manual focus type and is made of aluminum, making it durable and long-lasting. It also has a compatible lens front and filter size of 62mm, making it easy to find accessories for.

This lens is a great addition to any photographer's collection and is perfect for capturing stunning portraits, landscapes, and more. The exterior material of the lens is made of aluminum, which adds to its durability and longevity. It is a great option for those who want a high-quality lens without breaking the bank. So, whether you're a professional or an amateur photographer, this Asanuma lens is definitely worth considering.