Kenko 55mm Pro1D ND4 Filter**

This Kenko 55mm Pro1D ND4 Filter reduces the amount of light entering the lens so wider apertures can be selected, which is perfect for portraiture to reduce depth of field. Subject appears crisp and clear while the background becomes a soft blur. Also widely used for photographs of waterfalls and other nature scenes to emphasize movement. The ND4 reduces light entering the camera lens by the equivant of 2 stops.