This Fader ND is a compact all-in-one variable neutral density filter that adjusts the amount of light reduction with just the twist of your wrist. The index marks on the filter let you know exactly the amount of reduction at a glance. Giving you clear and precise shots at whichever density you are using. It is able to adjust neutral density freely from ND2 to ND400.It offers you the freedoam the create different neutral density freely.