The Vivitar Automatic Tele Converter Lens 2x-4 FL FD Japan is a high-quality teleconverter lens designed for Olympus and Vivitar cameras. With a maximum aperture of f/4.0-4.5, this lens is perfect for capturing detailed images with stunning clarity. Made of durable aluminum, this lens is a reliable choice for photographers looking to expand their creative capabilities. The auto focus feature ensures quick and accurate focusing, making it easy to capture the perfect shot every time. Made in Japan, this lens reflects the precision and quality that Vivitar is known for.