This product is a Canon Rangefinder 100mm f/3.5 L39 LTM Leica Screw Mount Lens from Japan. It is a high-quality telephoto lens specifically designed for Canon cameras, with a maximum aperture of f/3.5 and a focal length of 100mm. Manufactured in the 1960s, this lens features manual focus and a durable plastic exterior. Additionally, it comes with a 1-month manufacturer warranty and is compatible with 34mm filters. This rare and vintage lens is a valuable addition to any camera enthusiast's collection, offering unique perspective and quality for your photography needs.