The LEE85 Neutral Density 0.6 (2 stop) Standard reduces the exposure equally across the frame. This increases shutter speeds, blurs movement and allows for effects that can't be produced any other way.ND Standards can be stacked together, or used with other filters, so you can respond to almost any lighting situation.LEE85 ND Standards are available in 2 stop and 3 stop strengths - denoting the light stopping power of the filter.All LEE85 ND Graduated and Standard filters also feature a new grip tab, which increases the visible area and keeps finger prints off of the filter zone.