Hoya Softener B is a filter randomly arranging minute lens shaped like drops of water on the surface of a acrylic board. Scatters the light and results in a soft. It creates a picture with a clear focus and a soft gradation, and this effect is especially evident with an object with a point light source. Color reproduction is easy, and there is no need for exposure adjustment. Hoya Soft filters come in two grades: A & B. Soft B is stronger than Soft A. These filters are randomly scattered with small drop-like shapes creating a clear focus with soft gradation. These filters work best when used with an object having a point light source such as a candle or match.