Image sensing apparatus, control method therefor, program, and storage medium

A method of controlling an image sensing apparatus comprising a focus detection unit including a plurality of focus detection regions in a frame, comprising:

• a determination step of determining whether the focus detection unit has captured an object during servo autofocus in which the focus detection unit repeats focus detection even after obtaining an in-focus object image so that a focus follows motion of the object;
• and
• a selection step of, when a focus detection region to be focused is selected from the plurality of focus detection regions, selecting a first focus detection region if it is determined in the determination step that the object has not been captured, and selecting a second focus detection region if it is determined in the determination step that the object has been captured, wherein the first focus detection region is a focus detection region which is selected by prioritizing an object nearer to said image sensing apparatus, and the second focus detection region is a focus detection region which indicates information corresponding to an object distance nearer to an object distance of previous focus detection operation.