ʌnlˈaɪk mˈɛni ˈʌðɚ dˈɪdʒɪɾəl ˌɛsˌɛlˈɑːɹz, ðɪ ˈiː θɹˈiːhˈʌndɹɪd θˈɜːɾi jˈuːzd ɐ sˈɛkənd sˈɛnsɚɹ ɪnðə vjˈuːfaɪndɚ tʃˈeɪmbɚ wˌɪtʃ wʌz fˈɛd baɪ splˈɪɾɪŋ twˈɛnti pɚsˈɛnt ʌvðə lˈaɪt fɹʌmðə vjˈuːfaɪndɚ.
Unlike many other digital SLRs, the E-330 used a second sensor in the viewfinder chamber which was fed by splitting 20% of the light from the viewfinder.