The Tiffen Soft Grade ND 6 provides a 2-stop (0.6 density) light reduction at its darkest point, which gradually tapers to clear at the bottom of the filter.
A soft edge filter features a wide, smooth transition area, making it better for uneven horizons. A hard edge is used for flat, distinct horizons like the ocean.
Yes, this is a standard 4x5.65-inch cinema filter with a 4mm thickness, making it compatible with most professional matte box filter trays.