Buy from Amazon.com : http://fave.co/1bEhkoz <br /><br />Lee 4x4 Neutral Density Polyester Filter Set (0.3 ND 0.6 ND 0.9 ND)<br /><br />Product Description : <br />03 ND reduces light 1 stop <br />06 ND reduces light 2 stops <br />09 ND reduces light 3 stops
