The ALBINAR ADG auto tele converter lens 2x is designed for Canon FD mount cameras, specifically for SLR cameras with film technology. This teleconverter lens has a fixed focal length, making it suitable for zooming in on distant subjects with a maximum aperture of none. With manual focus capability, photographers can achieve precise shots with this lens, making it a versatile addition to their Canon camera setup. The Albinar brand ensures quality and compatibility with Canon cameras, providing a reliable option for photographers looking to expand their creative capabilities.