Consists of 11 elements in 9 groups. Wide-angle picture coverage of 94°. With this lens there is almost no need to focus, if the diaphragm is closed down slightly. This is one of the advantages of the extremely short focal length which provides profound depth of field. As coma aberration is minimized, the lens provides a very sharp image with high contrast even at full aperture. Accepts standard Nikon 72mm filters.