Cavision 6.6x6.6" Graduated Blue 0.6 Glass Filter

The graduated blue filter can be used to change the hue in one specific area of the image. One half of the filter is colored blue and the other half is transparent with a gradual transition between the two. The filter can be shifted and rotated in the filter stage to affect the portion of the image that is desired. The grad blue filter is especially useful for creating a blue sky effect.