The Schneider 4x4" Graduated Storm Blue 2 Glass Filter adds a grey-green color to ocean and sky for a stormy effect.
With graduated filters, often it is necessary or desirable to balance the light intensity in one part of a scene with another. This is especially true in situations where you don't have total light control, as in bright contrasty landscapes. Schneider Graduated Color filters are part clear and part color. They are designed to be used in professional matte boxes, so that they are readily positioned at the exact angle required to create desired effects.
Used primarily to add color to part of a scene where color may be weak or absent, Schneider Graduated Color filters can also be used for color effects which contribute to the cinematic drama of a scene. They are available in an array of colors. The Soft or Hard label indicates the degree of color graduation.