An image-capturing apparatus of the present disclosure includes a focus lens, an image sensor that captures an object image formed via the focus lens and generates image data, and a controller that calculates a value relating to an in-focus position based on (i) first image data generated by the image sensor when the focus lens is at a first position and (ii) second image data generated by the image sensor when the focus lens is moved from the first position by a first moving amount and located at a second position, and the controller changing a next moving amount of the focus lens from the first moving amount based on the calculated value relating to the in-focus position.