Take better photos with the HOYA ND 8X PROND 67mm ND filter. The filter's main advantage is that it reduces the amount of light that ends up on the camera’s sensor, allowing you to use a longer shutter speed. It also smooths out moving objects, such as flowing water. Another great feature of ND filters is that you can use a wider aperture with the same ISO sensitivity and shutter speed for a striking depth of field effect. The HOYA ND 8X PROND 67mm ND Filter features a 67 mm filter diameter, so you can fit it on all lenses of the same diameter. The ND factor of 8 indicates a light transmittance of 13%, i.e. a 8x longer exposure time.