The 4 x 4" Pro Indie HV Neutral Density Filter Kit will be of great use to anyone who enjoys shooting HD video with their DSLR or Camcorder. -The filters are produced with high-quality Water White Glass for increasing color fidelity and sharpness. Water White Glass is characterized by a low iron ultra clear glass that transmits 98% to 99% of light and is anti-glare and ant-reflective coated. -This ND Filter can work with the DSLRs that can shoot HD video and have a small 8-Bit color space. -The ultimate purpose was to insure that the final color did not have a greenish/brown tint that resulted from other ND filters. -Allows use of fast film in bright light