Lee Filters 4x6 (100x150mm) Neutral Denisty hard edge grad set includes 0.3, 0.6 and 0.9 hard edge grad filters and triple filter wrap Allows the transition to be blended into the scene, often imperceptibly Neutral density 0.6-to-clear, with a two stop differential Compensates the average bright sky-to-foreground situation The most popular density of the series Recommended for wide angle lenses and the hard edge is recommended for normal and longer lenses