PLR Optics 72MM HD Multi-Coated Variable Range (ND3, ND6, ND9, ND16, ND32, ND400) Neutral Density (ND) Fader Filter - 6 Filters in 1! + Lens Adapter Tube For The Nikon Coolpix P510, P520 Digital Camera Variable Range (ND3, ND6, ND9, ND16, ND32, ND400) Neutral Density (ND) Filter - 6 Filters in 1! With The PLR Variable Range ND Filter, You Can Enjoy Total Control Of Virtually Any Lighting Environment. Simply Turn Its Exterior Ring To Access Any Of 8 ND Settings Without Wasting Time Changing Or Adding Filters