The Pentax Lens 50mm F1.7 Auto-Chinon Multi-Coated is a high-quality standard lens designed for Pentax cameras with a manual focus system. Manufactured in the 1970s by Chinon, a reputable brand known for producing top-notch lenses, this lens features a maximum aperture of f/1.7 and a focal length of 50mm, making it ideal for capturing sharp images with beautiful depth of field. With its multi-coated finish and compatibility with 49mm filters, this lens is a valuable addition to any photographer's kit, offering excellent performance and construction.