Imaging apparatus and image blur correction method

An imaging apparatus comprising:

• a driving unit that moves a focus lens;
• a focusing unit that determines a focus state and outputs a focusing signal indicating a focus position of the focus lens;
• a control unit that controls the driving unit based on the focusing signal;
• an acceleration detection unit that detects acceleration of the imaging apparatus in directions of three orthogonal axes;
• a distance calculation unit that calculates an acceleration component in an optical axis direction based on the acceleration in the directions of the three orthogonal axes detected by the acceleration detection unit and calculates an object distance corresponding to the focus position indicated by the focusing signal based on the acceleration component in the optical axis direction;
• and
• a shake correction unit that corrects an image blur caused by a translational shake in directions of two orthogonal axes perpendicular to at least an optical axis based on the object distance calculated by the distance calculation unit and the acceleration in the directions of the three orthogonal axes detected by the acceleration detection unit,
• wherein the distance calculation unit calculates the object distance corresponding to the focus position indicated by the focusing signal based on the acceleration component in the optical axis direction, using characteristic information in which a correlation between the focusing signal and a position of the focus lens moved based on the focusing signal is represented by a relationship with the acceleration in the optical axis direction, and
• wherein at least one hardware processor implements the focusing unit, the control unit, the distance calculation unit, and the shake correction unit.