An excellent choice as a second lens to supplement a basic lens kit, this full-frame 28 mm wide-angle prime features a bright F2.0 maximum aperture and outstanding overall optical performance. Enhanced optics deliver excellent sharpness right out to the image edges plus elegently smooth bokeh when needed. A maximum aperture of F2.0 makes it easier to shoot clear images handheld indoors or in dim lighting. An inner focus mechanism achieves stable, quiet auto focus operation that is ideal for movies as well as stills. For even wider perspectives an optional 21 mm ultra-wide converter and 16 mm fisheye converter with full 180 (diagonally) coverage one are available for extra expressive potential. When wiping the dirt off, be careful to keep dust or debris from getting inside the camera body or the lens. Take care not to touch the lens surface. Do not use force but wipe lightly so as not to put pressure on the contacts of the body.