Patent ID: 8004598

Claim:
A focus adjustment apparatus comprising: an evaluation value calculation unit which calculates a focus evaluation value in a focus detection area in a shooting field of view, when a driven focusing lens reaches a predetermined lens position; a peak value detection unit which detects a peak value of the focus evaluation value, based on the focus evaluation value calculated by the evaluation value calculation unit, according to driving of the focusing lens; a correlation value calculation unit which calculates a correlation value between an image in the focus detection area when the focusing lens is located at a lens position apart by a predetermined distance from a lens position where the focus evaluation value reaches the peak value, to a close end side, and an image in the focus detection area when the focusing lens is located at a lens position apart by a predetermined distance from a lens position where the focus evaluation value reaches the peak value, to an infinity side; and a focused lens position determination unit which determines a lens position where the focus evaluation value reaches the peak value, to be a focused lens position of the focusing lens, when the correlation value calculated by the correlation value calculation unit is over a predetermined value.