Hoya 46mm HMC NDX4 Screw-in Filter

Neutral Density filters evenly reduce the amount of light passing thru the lens without effecting colour. Ideal for reducing bright light in large aperture situations when a narrow depth is field is needed. Allows for slower shutter speeds when blurring or showing of movement is desired. Allows balancing of exposure to highlight a key subject. Lets you use higher speed films in bright light. Hoya Neutral Density filters are available in most sizes and in three strengths: .3 2X Reduces the light one f-stop. .6 4X Reduces the light two f-stops. .9 8X Reduces the light three f-stops.