Designed for exclusive use with PENTAX digital SLR cameras, the smc PENTAX-DA 17-70mm F4 AL[IF] SDM covers the most frequently used focal lengths between wide-angle and telephoto ranges, and offers outstanding operability and image quality. Featuring advanced technologies such as special optical glass elements and PENTAX-original lens coatings, it is designed to assure exceptional optical performance and deliver clear, high-contrast images, even at image-field edges.