Imaging device and imaging method

An imaging device comprising:

• an imaging section that receives a subject image to capture, and generates image data;
• an image capture optical system that forms the subject image on an imaging surface of the imaging section and includes a focus lens for focus adjustment;
• and
• a controller that controls movement of the focus lens based on the image data and performs a focus adjustment operation, wherein:
• the controller sets in an image represented by the image data a first focus adjustment region, which is a target of adjustment of focusing conditions, and a second focus adjustment region, which is a target of adjustment of focusing conditions and has a lower priority of adjustment of focusing than the first focus adjustment region;
• the controller determines whether or not focus adjustment based on image data in the first focus adjustment region is difficult;
• the controller performs focus adjustment based on image data in the second focus adjustment region, if the focus adjustment based on the image data in the first focus adjustment region is difficult;
• the controller repeatedly determines whether or not the focus adjustment based on the image data in the first focus adjustment region is difficult, while performing the focus adjustment based on the image data in the second focus adjustment region;
• and
• the controller stops the focus adjustment based on the image data in the second focus adjustment region and performs the focus adjustment based on the image data in the first focus adjustment region, if the focus adjustment based on the image data in the first focus adjustment region is not difficult.