The Focal MC 2X Teleconverter Lens for Pentax K Mount is a high-quality lens designed for Pentax cameras. With a maximum aperture of f/2.8, this lens is perfect for capturing crisp and detailed images. The manual focus feature allows for precise control over your shots, while the included front and rear caps ensure your lens stays protected when not in use. Made in Japan, this lens comes with a case for easy storage and transportation. Upgrade your photography gear with this reliable and versatile teleconverter lens.