Offered here in black, the HD PENTAX-D FA 21mm f/2.4ED Limited DC WR Lens from Pentax provides an ultra wide-angle field of view on K-mount full-frame DSLR cameras. An ideal lens for architectural and landscape photography, this lens provides you with a sophisticated optical design for outstanding sharpness and even illumination. The broad 92° angle of view is well-suited to all-around shooting for both interior and exterior locations. When used for distant subjects such as landscapes, it assures solid, uniform image rendition across the image field and delivers sharp, clear, high-resolution images.