Used Cokin Z123L Graduated Light Blue #2 Filter - 4x6"/100x150mm Z-Pro Series

· Blue Graduated filters enhance the sky while they underline the colors of mountain landscapes.
· They are also the filters for sea photography where they intensify the white sparkle of breaking waves. They are available in five variations.
122 - B1 graduated blue filter reduces the light 1 stop.
123 - B2 graduated blue filter reduces the light 3 stops.
123L - 2x Light starts with the same neutral density as 122, but feathers the blue almost from the color edge and more gently graduates to clear. One stop of compensation.
A123S - 8x Is the same density of color as 123M but the graduation extends to 3/4 of the filter. Requires 3 stops.
123F - 8x Full is the same as 123S except that the blue covers the entire filter. Requires 3 stops.