It is Mainly used to eliminate harmful non-metallic reflected light , and increase the color concentration .
It Also enhances blue sky ,highlights white clouds, Makes the picture more thorough ,improves image clarity and overall creattes a more expressive and vivid photo.
It is also often used in shootting through glass ,water and underwater scenery .
Higher the ND Value,more obvious the light reducing effect .
It Reduces the amount of light in very bright conditions so that camera can choose the correct exposure value and avoid excessive exposure . It also improves the color saturation of the picture,Makes the picture more transparent and alive.