Already confirmed. High-performance 50mm lens with a bright f/1.7 aperture, capable of sharp rendering. - Model Name: SMC PENTAX-M 1:1.7 50mm - Focal Length: 50mm - Aperture: f/1.7 - Country of Manufacture: JAPAN There is some mold inside the lens, but it can be used for shooting without any problems. Thank you for viewing.