UV filter with Anti-Stain Coating (ASC) - 77mREALPRO series filters are designed using Kenko's highest quality control standards and experience in producing photographic filters. The REALPRO series aims to meet professional and amateur photographers' needs as they continue to become more demanding.The REALPRO UV is multi-purpose fine-weather filter that blocks UV light which can cause hazy and unclear photos on a sunny day. REALPRO UV filters use UV-cut glass that blocks light in the unwanted UV spectrum before it enters the lens. This type of glass has a slight yellow tint but there is no negative effect on the image. The REALPRO UV is a universal filter because it also serves as a permanent lens protector.Features:Blocks UV light which can cause hazy and unclear photos on a sunny dayAnti-Stain Coating (ASC) helps moisture and water drops bead & slide off keeps it clean for longerAnti-Reflection Multicoating gives maximum light transmission and protects from flare or ghostingU