The Vivitar 75-205mm MC 2X Matched Multiplier Teleconverter is a high-quality teleconverter lens designed for Pentax cameras with a K mount. Made in Japan, this lens features a maximum aperture of f/2 and manual focus capabilities. The Vivitar MC Macro series ensures sharp and detailed images, making it ideal for capturing distant subjects with precision and clarity. The durable aluminum exterior not only protects the lens but also adds a touch of sophistication to your photography equipment. Perfect for photographers looking to expand their lens capabilities and explore new genres of photography.