Runshuangyu 4x4 Neutral Density ND2, ND4, ND8 Filter Set with 6 Slots Filter Bag for Swing Away Matte Box Holder (Full & Graduated ND Filters)

This Graduated ND filter is ideal for reducing bright light in large aperture situations when a narrow depth is field is needed. Allows for slower shutter speeds when blurring or showing of movement is desired. Allows balancing of exposure to highlight a key subject Lets you use higher speed films in bright light A matte box really makes it easy to transition between different lenses when your camera is sitting on the rig. Assuming that each lens has a different lens cap diameter - you would have to have ND filters or other filters to fit each lens. But if you use a matte box you can just simply pull out the matte box filter holder and pop in this 4" x 4" filter for all size lens. It would save time for you and will be much convenient for your shooting