Buy from Amazon.com : http://fave.co/1xIltBI <br /><br />Zomei? Density Neutral Gray ND8 Square Z-PRO Series Filter - 143mm x 100mm<br /><br />Product Description : <br />Compatible with Cokin Z-PRO Series need to work with Z Series holder and adapter ring <br />Recommended for SLR or Full Frame or APS-C D-SLR cameras with wide-angle lens from 72mm <br />Neutral Density ND2 reduces the light 1 full stop <br />Neutral Density ND4 reduces the light 2 full stops <br />Neutral Density ND8 reduces the light 3 full stops