wˌɛn jˈuːzd ɪn fɹˈʌnt ʌvðə kˈæmɹə lˈɛnz, ɐ dᵻfjˈuːʒən fˈɪltɚ sˈɔfənz sˈʌbdʒɛkts ænd dʒˈɛnɚɹˌeɪts ɐ dɹˈiːmi hˈeɪz.
When used in front of the camera lens, a diffusion filter softens subjects and generates a dreamy haze.