The Urth 39mm Plus+ ND64-1000 (6-10 Stop) Variable ND Lens Filter is a variable grey filter that reduces light by 6 to 10 f-stops, giving you more creative control in varying lighting. By blocking the light by 6 to 10 f-stops, you can use a larger aperture or slower shutter speeds to create a smaller depth of field or long exposure effects by using longer shutter speeds without overexposed images.
