Original Nikon ND4 28mm filter from Japan in hard case. Good used condition, clean glass and threads.
Often used with the Coolpix camera (28mm threads) and sold in a set. This is your chance to pick-up just the ND4 neutral density filter.
The ND filter is basically a filter that, placed before the lens reduces the amount of light making its way into the camera. ND filters come in different strengths or darkness levels. For the photographer, the easiest thing would be to have ND filters that tell you how many stops of light they will darken your exposure. The most popular Neutral density filters range between ND2, ND4 and ND8 (1, 2 or 3 stop) filters.