ɐ flˈæʃ dᵻfjˈuːsɚ ˈɔːlsoʊ kˈɔːld ɐ spˈiːdlaɪt dᵻfjˈuːsɚ, ɔːɹ ʃˈuːtθɹuː dᵻfjˈuːsɚ spɹˈɛdz ðə lˈaɪt fɹʌmðə flˈæʃ əvə kˈæmɹə.
A flash diffuser (also called a speedlight diffuser, or shoot-through diffuser) spreads the light from the flash of a camera.