Method of controlling digital photographing apparatus for out-focusing operation and digital photographing apparatus adopting the method

Provided is a method of controlling a digital photographing apparatus that displays an image of a photograph region on a display panel, generates an image signal of the photograph region in response to signals generated by a shutter release button, and stores image data of the image signal in a storage medium. In an out-focusing mode, the method includes amplifying the blurriness of an out-focusing region by low-pass-filtering image data of regions excluding a setting region within the photograph region.