The [Excellent+5] Vintage SMC Pentax-M 50mm f/1.7 Manual Focus Lens is a high-quality, standard lens designed for Pentax cameras. With a maximum aperture of f/1.7, manual focus capability, and a focal length of 50mm, this lens is ideal for capturing clear and detailed images. Manufactured in the 1980s in Japan, this Pentax SMC lens is compatible with cameras featuring the K-mount and a 49mm filter size. With its classic design and superior performance, this lens is a valuable addition to any photographer's collection.