Opteka 52mm HD Multicoated Graduated Color Filter Kit For Digital SLR Cameras Includes: Red, Orange, Blue, Yellow, Green, Brown, Purple, Pink and Gray ND Filters Graduated color filters provide a gradual color transition for a smooth blending effect High quality metal and HD glass construction Rotating frame to allow the user to bring the colored and clear filter portions into the desired position Double threaded allowing additional filters to be screwed one over the other Extremely solid and lightweight. No wobbling or cross-threading