Abstract: An illumination apparatus is communicatively connected to an image pickup apparatus and configured to emit illumination light. The illumination apparatus performs light emission control of the illumination light under the custom light emitting condition by reading the custom light emitting condition corresponding to a custom imaging condition from the memory in a case where imaging under the custom imaging condition set by the user is selected in the image pickup apparatus.

Abstract: An accessory attachable to and detachable from an image pickup apparatus includes at least one processor to function as an acquisition unit configured to acquire information about an image capturing mode of the image pickup apparatus to which the accessory is attached, a setting unit configured to set a setting value of a predetermined item, and a detection unit configured to detect an activation state of the image pickup apparatus, wherein the setting unit sets a predetermined setting value as the setting value of the predetermined item in a case where the acquired information indicates a first image capturing mode, and the setting unit sets the setting value of the predetermined item to be changeable from the predetermined setting value in a case where the activation state is detected as a non-activated state while the predetermined setting value is set as the setting value of the predetermined item.

Abstract: A lighting control device capable of checking shadow/shade on a subject intended by a user without impairing the real-time property. The lighting control device is wirelessly connected to a plurality of lighting devices each having a light unit capable of being on continuously, and controls turning on/off of the light units of the plurality of lighting devices. The lighting control device performs wireless communication with the plurality of lighting devices generates a turn-on instruction for the light unit, and transmits, to the plurality of lighting devices by the wireless communication: the turn-on instruction; information on a group to which each of the plurality of lighting devices belongs; and turn-on group information including a setting of one of light emission permission and light emission prohibition set for the group.

Abstract: An apparatus includes a control unit configured to control an aperture diameter of a diaphragm based on a result of photometry, a determination unit that, in a case where t light flux enters the imaging unit via a predetermined optical member which has light transmitted in quantities varying stepwise in a radial direction with respect to and optical axis, determine whether there exists a plurality of F numbers that indicates the aperture diameter of the diaphragm at which approximately identical quantities of light enter the imaging unit. In a case where the determination unit determines that there exists a plurality of F numbers at which approximately identical quantities of light enter the imaging unit, the control unit controls the F number to be differently set in accordance with information regarding an image capturing condition.

Abstract: An exposure control apparatus accepts a specification of a shutter speed, determines, based on the specified shutter speed, a first accumulation time in which an image sensor accumulates a charge for image capture during a live view, determines, based on the specified shutter speed, a second accumulation time in which the image sensor accumulates a charge for image capture when obtaining a still image; and controls the image sensor to accumulate a charge over the first accumulation time or the second accumulation time. The accumulation time that can be set in the image sensor differs between during the live view and when obtaining a still image, and the first determination unit varies a method of determining the first accumulation time according to whether or not the specified shutter speed is longer than a predetermined shutter speed.

Abstract: An exposure control apparatus accepts a specification of a shutter speed, determines, based on the specified shutter speed, a first accumulation time in which an image sensor accumulates a charge for image capture during a live view, determines, based on the specified shutter speed, a second accumulation time in which the image sensor accumulates a charge for image capture when obtaining a still image; and controls the image sensor to accumulate a charge over the first accumulation time or the second accumulation time. The accumulation time that can be set in the image sensor differs between during the live view and when obtaining a still image, and the first determination unit varies a method of determining the first accumulation time according to whether or not the specified shutter speed is longer than a predetermined shutter speed.

Abstract: An apparatus includes a control unit configured to control an aperture diameter of a diaphragm based on a result of photometry, a determination unit that, in a case where t light flux enters the imaging unit via a predetermined optical member which has light transmitted in quantities varying stepwise in a radial direction with respect to and optical axis, determine whether there exists a plurality of F numbers that indicates the aperture diameter of the diaphragm at which approximately identical quantities of light enter the imaging unit. In a case where the determination unit determines that there exists a plurality of F numbers at which approximately identical quantities of light enter the imaging unit, the control unit controls the F number to be differently set in accordance with information regarding an image capturing condition.