Image pickup apparatus and motion vector detection method

An image pickup apparatus comprising:

• a memory;
• and
• a processor configured to function, based on a program stored in the memory, as units comprising:
• (1) a detection unit configured to detect a motion vector between a plurality of captured images, a result of detection by the detection unit being used for image blur correction;
• (2) a first setting unit configured to set positions of a plurality of image regions used for motion vector detection by the detection unit;
• and
• (3) a second setting unit configured to set a target position of focus control,
• wherein the first setting unit sets the positions of the plurality of image regions whether the image pickup apparatus is in a first image blur correction mode or a second image blur correction mode,
• wherein, if the image pickup apparatus is in the first image blur correction mode, the first setting unit sets the positions of the plurality of image regions to be denser than if the image pickup apparatus is in the second image blur correction mode, and
• wherein the first setting unit sets the positions of the plurality of image regions according to the target position set by the second setting unit if the image pickup apparatus is in the first image blur correction mode.