Image pickup apparatus, control method for the same, and program for implementing the control method

An image pickup apparatus, comprising:

• a focus lens;
• a zoom lens;
• an operating member for manually controlling the movement of said focus lens;
• a detection device adapted to detect an operation amount of said operating member;
• and
• a control device adapted to cause said focus lens, in accordance with the operation amount detected by said detection device, to move along an optical axis direction and to stop,
• wherein, when the present state of said focus lens, where a depth of focus changes in accordance with a change in a focal distance and a change in an aperture, is in a second depth of focus, which is deeper than a first depth of focus, said control device sets responsiveness to the operation amount detected by said detection device higher than when the present state of said focus lens is in the first depth of focus to keep apparent change in blurring in response to the operation amount of said operation member during a manual operation of said operating member even.