Patent ID: 8995826
Filing Date: 2015-03-31
Classification: G03B

Abstract:
1. An image capturing apparatus comprising: a lens unit that has a plurality of lenses, the lens unit being capable of changing a focal length by moving at least one of the plurality of lenses; a diaphragm that is disposed between the plurality of lenses included in said lens unit; an imaging unit that outputs an image signal according to light incident through said lens unit; a filter that adjusts a quantity of light which has passed through the one of the plurality of lenses to change the focal length and is capable of moving in a direction of insertion to an optical path of the light toward said imaging unit and in a direction of retraction from the optical path; and a control unit that controls an aperture diameter of said diaphragm and a position of said filter, wherein, when the focal length of said lens unit is changed, the control unit controls the aperture diameter of said diaphragm and the position of said filter based on information related to a changed focal length of said lens unit, wherein said control unit changes the aperture diameter of said diaphragm so that the aperture diameters are different before and after the change in the focal length of said lens unit, and controls the position of said filter according to a change in the aperture diameter of said diaphragm, and wherein said control unit changes the direction of moving the position of said filter along with the change in the focal length of said lens unit according to the position of said filter before the change in the focal length of said lens unit.