This is a filter made by Freewell that combines a variable ND filter and a mist filter (1/8 mist strength). The 6-9 stop range, equivalent to ND64-ND512, was useful for outdoor shooting from a normal sunny day to a very bright summer day. I am selling this because I have switched to a different filter system. There are scratches on the lens cap and case, and a few millimeter scratches on the filter, but they do not affect the image quality. Please understand that this is a used item and no claims or returns are accepted.