The BENOISON Telephoto Lens 420-800mm is a Canon EF lens designed for DSLR cameras. With a manual focus feature and zoom capabilities, this lens allows for precise and versatile shooting. The lens has a maximum aperture of f/8.3-16, making it ideal for capturing clear and detailed images. Compatible with Canon cameras, this telephoto lens is perfect for photographers looking to expand their creative capabilities with a high-quality and reliable lens option.