Patent ID: 8134635

Claim:
An image capturing apparatus for assisting manual focusing operation, the apparatus comprising: an interchangeable optical system which forms an image of a subject: an image sensor which converts the image formed by the interchangeable optical system into a video signal; a focus operating unit which drives the interchangeable optical system according to a manual operation; an autofocus unit which adjusts a position of the interchangeable optical system so as to obtain the best in-focus condition based on the video signal from the image sensor; and a focus range determining unit which derives a depth of field from the interchangeable optical system and determines an auto focusing range of the auto focus unit based on the depth of field, wherein the autofocus unit is adapted to adjust the position of the interchangeable optical system within the auto focusing range determined by the focus range determining unit so as to have the position of the interchangeable optical system after the focus operating unit drives the interchangeable optical system as a center.