FeaturesNeutral Density filters are used primarily to reduce the amount of light entering the lens without affecting the overall color tone. With lower exposure value, pictures taken especially on waterfall will be more natural with "flowing effect". Neutral Density 4 will reduce light volume by 2 f/stops whereas Neutral Density 8 will reduce light volume by 3 f/stops.
Optics: Special ND color optical glass
Mounting diameter: 37mm to 77mm
Inner thread: Yes
Whats in the box:Emolux Neutral Density 67mm ND8 Filter