【Matte Box ND Filter】 Designed for NEEWER matte box, also compatible with Tilta compatible with SmallRig mini matte box and filter frame. The 4"x5.65" sqaure filter enables better control over shutter speed and aperture, avoids overexposure and balances image exposure, perfect for photography and videography under bright sunlight with motion blur effects | 【HD Optical Glass with No Color Cast】 HD optical glass delivers high clarity and ensures no color balance affected. Instead of threading onto lenses, the square ND filter is mounted on a matte box and suits lenses of various focal lengths, perfect for 8K and 4K video recording | 【ND0.3 Filter with 50% light transmittance】 The ND0.3 neutral density filter blocks 1 stops of light from entering into camera lens and features 50% light transmittance. The number 0.3 stands for the filter’s optical density. Optical density grows and light transmittance lowers as the number goes up | 【Dual Sided 30 Layered Coatings】 30 layers of coatings on both sides make the filter scratch resistant, water repellent, oil proof and fingerprint resistant. Use the included cleaning wipes to clean the filter with ease | 【Super Slim & Lightweight】 0.16"/4mm thick and weighs only 5.12 oz/147g. This ultra slim and lightweight filter adds barely noticeable weight to your filming setup when mounted on. Store it in the carrying case for safekeeping and easy carrying