The Vivitar Tele Converter 3x4 FL-FD is a high-quality lens accessory designed for Canon FD mount cameras. With a focal length multiplier of 2.0x, this teleconverter allows photographers to achieve a fixed prime focal length for their telephoto lenses. Made in Japan, this converter ensures excellent image quality and durability, and comes caps, ideal for photographers looking to extend the telephoto capabilities of their Canon FD mount lenses, this Vivitar teleconverter is a reliable and versatile addition to any camera kit. As is