Hoya 49mm 4X (0.6) Neutral Density Multi Coated Glass Filter
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Neutral Density filters evenly reduce the amount of light passing thru the lens without effecting color.
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.