This high quality lens from Mamiya Sekor is a great addition to any photographer's arsenal. It has a maximum aperture of f/2 and a focal length of 50mm, making it great for capturing sharp and clear images. The lens is compatible with M42 mounts and has an automatic focus system, allowing for quick and easy adjustments. Made in Japan, this lens is built with both plastic and metal exterior materials and comes with caps and a 52mm filter. It is designed to be compatible with Mamiya cameras and provides excellent image quality. Whether you're a professional photographer or just starting out, this Mamiya Sekor lens is a solid choice.