With precision and high-performance optics, the HD PENTAX DA 21mm F3.2 AL Limited measures only 2.5cm in length. It is the ideal choice for carry- everywhere, instantaneous wide angle or everyday photography. With a minimal focusing distance of 0.2m and versatile angle of view, enjoy natural images with a moderate perspective or an expanded depth of field, making the lens ideal for many different types of subjects, stories, landscapes and life’s special occasions. With a rounded diaphragm at wide apertures, its unique design incorporates high-grade aluminum construction with treatments of both SP (Super Protect) and the PENTAX-original High-grade multi-layer HD (High Definition) coating.