This invention has as its object to execute an optimal automatic focusing operation in both a case that attaches an importance on the focusing precision, and a case that attaches an importance on quick photographing. To this end, an apparatus includes a focus lens used to make focus adjustment of an object image, a motor and focus lens drive circuit for driving the focus lens, and an image sensing element for converting an object image formed by the focus lens into an electrical signal, and extracts a signal that represents the high-frequency component of a luminance signal of an object from the output signal of the image sensing element.