Using a narrow net pattern the White Net 1 Diffusion filter helps reduce contrast while maintaining critical sharpness. The intensity of the effect corresponds with the focal length of the lens and the aperture setting. Longer focal lengths and wider apertures create the most dramatic effects where wide lenses and narrow apertures reduce the effect. Careful testing will allow you to create the most effective end result. The White Net 1 creates more diffusion than the White Net 2 filter.