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. A122 - B1 graduated blue filter reduces the light 1 stop. A123 - B2 graduated blue filter reduces the light 3 stops. A123L - 2X Light starts with the same neutral density as A122, 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 A123M but the graduation extends to 3/4 of the filter. Requires 3 stops. A123F - 8X Full is the same as A123S except that the blue covers the entire filter. Requires 3 stops

• Manufactured from CR-39 organic glass - originally launched for the vision lens industry
• CR-39 organic glass is extra lightweight, with excellent optical transmission and high compatibility to colouring
• Highly resistant to shocks so you can handle the filters in complete confidence and safety