B (ND) G Base Neutral Density Graduation 67mm square filter for Pro4 and Cokin A series holders. Strengthens base with no loss of detail to overall composition. No compensation needed when using TTL metering but you need to add 1/2 stop when using an external meter. Gives optimum performance when used between f/4 and f/11.
marks around edges where it's been inserted in filter holder, and scratch mid way up the filter. Should still be useable.