This high-precision filter utilizes a special multi-layer coating applied using vacuum deposition technology. It offers extremely neutral characteristics and is a high-precision neutral gray filter with excellent color reproduction. This is a 72mm Kenko PRO ND4 filter, designed to adjust light levels and achieve smooth images. - Brand: Kenko - Model: PRO ND4 - Size: 72mm - Type: ND Filter The ND4 reduces the light by 1/4, which is equivalent to a 2-stop reduction in light (25% transmittance). It reduces only the amount of light without affecting the colors. It is used when you want to lower the shutter speed or to avoid diffraction caused by using a small aperture like F22.