Digital photographing apparatus and method of operating image pickup device

A digital photographing apparatus and a method of operating an image pickup device reduce generation of smear. The image pickup device includes a matrix of photoelectric converters which generate charges from incident light, vertical transfer paths for reading charges generated in the photoelectric converters and for transferring the read charges in a vertical direction, and a horizontal transfer path for transferring the charges on the vertical transfer paths in a horizontal direction. The method includes: applying vertical and horizontal transfer signals for causing the charges generated in photoelectric converters defining a subset of rows of the photoelectric converters to be read by the vertical transfer paths and to be transferred in the horizontal direction along the horizontal transfer path; and providing a predetermined period of time in which the horizontal transfer signals are not applied to the horizontal transfer path while charges are being transferred to the horizontal transfer path.