This diffuser softens and reduces your light by approx. -2/3 f-stop (value measured directly behind the diffuser screen). The light/shadow contrast is optimally balanced, for example, you can now control runaway highlights, even in strongly-angled sun and the highest contrasts. You get an even base-light and can light from the shadows in portraits, for example, and achieve great image results. Or use a SUNBOUNCE reflector to create light accents, however desired. In any case, you can now have the lighting situation under control.