Image pickup apparatus

An image pickup apparatus including a specific operation member for accepting an operation input, the image pickup apparatus comprising:

• a shooting optical system including an aperture;
• an aperture driving control unit configured to adjust a size of the aperture;
• an image pickup unit configured to receive a light image of a subject through the aperture and generate an image signal;
• a display unit configured to display an image on the basis of the image signal;
• a brightness adjustment unit configured to adjust a display screen brightness of the display unit;
• an electronic finder unit configured to cause the display unit to display the image relating to the light image of the subject before performance of a main shooting process on the basis of image signals generated in sequence by the image pickup unit;
• an optical finder unit configured to guide the light image of the subject to a finder window;
• and
• an allocation unit configured to allocate a function of the image pickup apparatus to the specific operation member,
• wherein one of the electronic finder unit and the optical finder unit can be selectively used, and
• the allocation unit includes
• an allocation control section configured to allocate a first function to the specific operation member in the case in which the optical finder unit is used and allocate a second function to the specific operation member in the case in which the electronic finder unit is used, wherein
• the first function is a function which is not used in the case in which the electronic finder unit is used, and the second function is a function which is not used in the case in which the optical finder unit is used,
• the first function is a function used to adjust, by using the aperture driving control unit, the size of the aperture to a size set in the main shooting process, and
• the second function is a function used to adjust, by using the brightness adjustment unit, the display screen brightness in response to ambient light around the display screen.