dᵻfjˈuːʒən fˈɪltɚz mˈeɪ biː jˈuːnɪfˌɔːɹm ɔːɹ mˌeɪhɐv ɐ klˈɪɹ sˈɛntɚɹ ˈɛɹiə tə kɹiːˈeɪt ɐ vɪnjˈɛt ʌv dᵻfjˈuːzd ˈɛɹiə ɚɹˈaʊnd ðə klˈɪɹ sˈɛntɚ sˈʌbdʒɛkt.
Diffusion filters may be uniform or may have a clear center area to create a vignette of diffused area around the clear center subject.