As the first zoom lens in Ricoh Imaging’s acclaimed Limited Lens series , this lens features a versatile focal length of from 30.5mm to 61.5mm (in the 35mm format) , ideal for a variety of subjects, settings and creative perspectives, all housed in a durable weather sealed body with state-of-the-art High Definition (HD) coating. With its large F2.8 maximum aperture and rounded diaphragm blades, the HD PENTAX DA 20-40mm F2.8-4 ED Limited DC WR lens produces stunning bokeh for exceptional visual expression. The in-lens direct current (DC) focus motor provides fast, quiet and smooth autofocus functionality.