About the Cokin A122 Filter, A, Blue Graduated B1
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
