The Tiffen 72mm Black Satin 1/4 Filter helps to reduce the overall contrast of an image and better control the highlights within a scene. In addition to rendering highlights with a grittier, more grainy appearance, this screw-in filter also helps to subtly soften facial blemishes and wrinkles for a natural, refined look. This filter is constructed from water white glass and is made using ColorCore technology, a process that involves laminating the filter substrate between two pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and mounting on precision metal rings.