ND 1.8 (6 Stop) ND Filter: Achieve balanced exposure for sunset/sunrise/sky photography and cinematic scenes with the SmallRig ND 1.8 (6 Stop) Filter. This versatile filter is perfect for professional photographers and videographers seeking high-quality results. | Why Choose Square ND Filters: Experience high-clarity pictures without sacrificing image quality with this Neutral Density Filter. The square design can be used for a Matte Box or 4 x 5.65" filter tray stacked with multiple filters for better control of light and color reproduction. NOTE: Incompatible with 100 x 150mm filter tray. | 1.56% Light Transmittance: The 4 x 5.65" filter features 1.56% light transmittance, with 6 stop of light blocking. ND 1.8 stands for the filter’s optical density. Optical density grows and light transmittance lowers as the number goes up. | Double-sided Multilayer Nano-coating: The filter is coated on both sides with multilayer nano-coating to reduce lens flare and optimize light transmission. These coatings are waterproof, oil-resistant, and anti-scratch, making the filter easy to clean and store, and ideal for use in video or film shooting. | High Quality B270 Optical Glass: Made with high quality B270 optical glass, this filter is precisely ground and polished for use with lenses of various focal lengths. The filter has high-precision color restoration with minimal loss of image detail at moderate color temperature, which is a versatile tool for photographers and videographers | For Matte Box and Filter Tray: Supports SmallRig mini matte box 3196, 3575; 3680, Multifunctional Modular matte box 3641, 3645, 3556. Package Included: 4 x 5.65" ND1.8（6 Stop）Filter x 1, Carrying Bag x 1, Clean Cloth x 1