Patent ID: 8447179

Claim:
A digital photographing apparatus that applies a multi-autofocusing (AF) function using a contrast AF method, the digital photographing apparatus comprising: a photographing lens; an image pickup unit that converts image light obtained from a subject through the photographing lens into an electrical signal to generate an image signal; a driving unit that drives a focus lens of the photographing lens; a calculation unit that calculates an AF evaluation value by performing AF on the image signal; a multi-AF detection unit that detects a peak of an AF evaluation value of each of a plurality of multi-points into which a captured image formed by the image signal is divided; a scanning unit that continues to scan regions of multi-points after scanning and detecting a central multi-point and a nearest multi-point of the captured image; and a main subject determination unit that selects the peak of the central multi-point or nearest multi-point according to a predetermined multi-AF method, determines a subject corresponding to the multi-point where the peak is selected as a main subject, and performs the contrast AF on the main subject.