The Tamron AF Tele-Macro 1:3.9 LD 70-300mm F4-5.6 Zoom Lens is specifically designed for Pentax AF cameras, offering maximum aperture settings from f/4 to f/5.6. This lens features a 70-300mm focal length range, making it versatile for a variety of photography styles and subjects. With a durable plastic exterior and both auto and manual focus capabilities, this lens is a reliable choice for Pentax photographers looking to expand their creative capabilities. Made by Tamron in Japan, this lens also includes a 58mm front lens and filter size for added convenience.