Enhance your photography skills with the Zykkor Auto 2X Teleconverter (PK) and Case. This high-quality teleconverter is compatible with Pentax K mount and features an auto-focus function for added convenience. With a maximum aperture that is hard to beat, this teleconverter is perfect for capturing stunning images from a distance. Whether you're a professional photographer or an amateur, this teleconverter is a must-have addition to your camera accessories. The package also comes with a protective case to keep your teleconverter safe and secure.