An image processing apparatus configured to process an image taken by an image-pickup unit includes a memory configured to store a relationship between a color shift amount at positions that are symmetrical with respect to an origin of an image and a blur amount relating to a curvature of field at the positions symmetrical with respect to the origin of the image, a detector configured to detect a color shift amount at the positions that are symmetrical with respect to the origin of the image, an acquirer configured to acquire the blur amount relating to the curvature of field corresponding to the color shift amount detected by the detector based on the relationship stored in the memory, and a processor configured to execute image processing that is asymmetrical with respect to the origin so as to correct the blur amount relating to the curvature of field acquired by the acquirer.