Opteka 9-Piece HD Multi-Coated Graduated Color Filter Set contains a variety of multi-coated glass filters that provide a gradual color transition for a smooth blending effect in front of the camera lens, giving photographers control over light and allowing them to emphasize the features of a scene that they consider most important. Includes 9 different filters: Red, Orange, Blue, Yellow, Green, Brown, Purple, Pink & Grey ND Filters.