The Sigma-XQ Mirror Ultra-Telephoto 500mm f/8 lens is a high-quality manual lens designed for Canon FD mount cameras. Manufactured in the 1970s in Japan, this telephoto lens features a maximum aperture of f/8 and a focal length of 500mm, making it ideal for capturing detailed images with a shallow depth of field. With its durable metal exterior, this lens is both lightweight and easy to carry, making it a versatile and reliable option for photographers looking to expand their creative capabilities.