Patent ID: 8368802

Claim:
An automatic focusing method, the method comprising: setting one mode among a macro mode and a normal mode, wherein the macro mode is appropriate for photographing a subject within a first distance and the normal mode is appropriate for photographing a subject beyond the first distance; setting a boundary region for auto-focusing in a first region corresponding to the one mode, the boundary region starting at a boundary position beyond an ending position of the first region and apart from the ending position by a number of driving steps of a focus motor times two; performing the auto-focusing in the first region corresponding to the one mode; determining whether a position of a focus lens is within the boundary region; if the position of the focus lens is within the boundary region, determining whether a final position of the focus lens is set according to the result of the auto-focusing in the first region; and performing auto-focusing in a second region corresponding to the other mode among the macro mode and the normal mode in the same direction as the auto-focusing in the first region without the user selecting the other mode when the final position of the focus lens is not set in the first region.