Kyungwoo Chun “puts portraiture in a new position. The core of Chun’s intriguing method portraiture lies in the prolonged exposure time. Often the exposition time lasts the subject’s age in minutes, but it can also go up to several hours. The effect of this method is that the subjects being photographed become blurred figures, nonetheless with a certain expressiveness.” (source). Find more samples and/or texts here, here, and here.