Neutral Density Filter
ND4 ND8 ND16 ND 32 64 Great for portraiture and outdoor scenes in strong sunlight. Reduces the amount of light reaching the film without affecting the color. Applies slow shutter speed under strong sunlight exposure. Allows wider apertures, effectively decreasing depth of field. ND4 reduces the intensity by two degree; ND8 reduces three...... Made of high-quality optical glass.