Control your shutter speed in ever-changing lighting conditions. The VND Peter McKinnon Edition has laser-etched stop indicators which precisely align two fused quartz glass elements to control the amount of light entering your lens. The controlled stop range eliminates cross-polarization and vignetting so your run-and-gun content is produced the way you intend it to be.Quartz Line Series 6-9 top variable ND filterControl your shutter speed in ever-changing lighting conditionsControl your shutter speed in ever-changing lighting conditionsPolarpro 77mm 6-9 Stop Filter