Patent ID: 7565072

Claim:
A camera comprising: a first focus detection device which is capable of obtaining a defocus amount from a phase difference of a main object and detecting a focus on a basis of the defocus amount in a plurality of defocus amount detection areas; a second focus detection device which detects a focus in accordance with contrast signal of image signal that is obtained from an image sensor while a focus lens is moving; a first area in a photographing field of view where the focus can be detected by both said first focus detection device and said second focus detection device; a second area in the photographing field of view where the focus can be detected by said second focus detection device and cannot be detected by said first focus detection device; and a determining device which determines whether the main object to be focused exists in the second area, wherein said second focus detection device detects a focus while the focus lens is moving in accordance with detection result of the first focus detection device, and wherein a selection method for selecting a defocus amount detection area from the plurality of defocus amount detection areas is changed in accordance with whether the main object to be focused exists in the second area or not.