Patent ID: 8208803

Claim:
A focus adjusting device comprising: a detecting unit configured to detect a focusing target from a captured image; a setting unit configured to set, in response to the detection of the focusing target by the detecting unit, a first focus detection area for detecting a focusing condition of a focusing lens; and a focus adjusting unit configured to perform focus adjustment by moving the focusing lens based on a signal of the first focus detection area, wherein the setting unit is operable, when the focusing target is no longer detected after the first focus detection area has been set in response to the detection of the focusing target by the detecting unit, the setting unit sets at least one second focus detection area in accordance with the position of the first focus detection area and, in accordance with the signal of the first focus detection area and the signal of at least one second focus detection area, the focus adjusting unit selects either of the signal of the first focus detection area or the signal of at least one second focus detection area and performs the focus adjustment with the selected signal, wherein, when the focusing target is detected by the detecting unit, the focus adjusting unit performs the focus adjustment with the signal of the first focus detection area.