Abstract: An electronic apparatus to which an accessory is detachably attached, the electronic apparatus includes a receiving unit and a processing unit. In a case where a first accessory is attached to the electronic apparatus via a second accessory, the receiving unit receives, from the first accessory, first information indicating whether or not an operation of the first accessory attached to the electronic apparatus via the second accessory is to be permitted, and the processing unit makes different control over the operation of the first accessory in accordance with the first information.

Abstract: An electronic apparatus connectable to an external electronic apparatus and storing at least one power supply for operating the external electronic apparatus includes a connection interface that is connected to the external electronic apparatus, and at least one processor configured to control the electronic apparatus. Power of the at least one power supply is supplied to the external electronic apparatus via the connection interface. The at least one processor controls the external electronic apparatus by using power received from the external electronic apparatus via the connection interface.

Abstract: A device includes a load test unit that determines whether to permit startup of the device using power of a battery supplying power to the device, and a control unit that starts up the device in a case where it is determined to permit startup of the device using the battery and a first voltage is requested of a power supply apparatus to restrict power received from the power supply apparatus. The control unit cancels the restriction of the received power in a case where a notification of completion of connection is received from the power supply apparatus, after the device is started up and a second voltage is requested of the power supply apparatus.

Abstract: An electronic device includes a connection unit and a control unit. The control unit enables a power supply path for supplying power from a first battery connected to an external device to the electronic device and enables a power supply path for supplying power from a second battery connected to the external device to a predetermined functional unit of the external device, in a case where the first battery or the second battery connected to the external device is not charged. The control unit disables a power supply path for supplying power from the second battery connected to the external device to the predetermined functional unit and enables a power supply path for supplying power from the electronic device to the first battery or the second battery, in a case where the first battery or the second battery connected to the external device is charged.

Abstract: An electronic apparatus to which an accessory is detachably attached, the electronic apparatus includes a receiving unit and a processing unit. In a case where a first accessory is attached to the electronic apparatus via a second accessory, the receiving unit receives, from the first accessory, first information indicating whether or not an operation of the first accessory attached to the electronic apparatus via the second accessory is to be permitted, and the processing unit makes different control over the operation of the first accessory in accordance with the first information.

Abstract: An electronic device includes a connection unit and a control unit. The control unit enables a power supply path for supplying power from a first battery connected to an external device to the electronic device and enables a power supply path for supplying power from a second battery connected to the external device to a predetermined functional unit of the external device, in a case where the first battery or the second battery connected to the external device is not charged. The control unit disables a power supply path for supplying power from the second battery connected to the external device to the predetermined functional unit and enables a power supply path for supplying power from the electronic device to the first battery or the second battery, in a case where the first battery or the second battery connected to the external device is charged.

Abstract: A device includes a load test unit that determines whether to permit startup of the device using power of a battery supplying power to the device, and a control unit that starts up the device in a case where it is determined to permit startup of the device using the battery and a first voltage is requested of a power supply apparatus to restrict power received from the power supply apparatus. The control unit cancels the restriction of the received power in a case where a notification of completion of connection is received from the power supply apparatus, after the device is started up and a second voltage is requested of the power supply apparatus.

Abstract: An apparatus includes a first authentication unit that performs an authentication process for determining whether an external apparatus is a predetermined external apparatus, a second authentication unit that performs an authentication process for determining whether a battery connected to the external apparatus is a predetermined battery, and a control unit that permits the battery to be discharged but restricts the battery from being charged regardless of whether the battery is the predetermined battery, in a case where the external apparatus is not authenticated as the predetermined external apparatus.

Abstract: An electronic apparatus connectable to an external electronic apparatus and storing at least one power supply for operating the external electronic apparatus includes a connection interface that is connected to the external electronic apparatus, and at least one processor configured to control the electronic apparatus. Power of the at least one power supply is supplied to the external electronic apparatus via the connection interface. The at least one processor controls the external electronic apparatus by using power received from the external electronic apparatus via the connection interface.

Abstract: An image pickup system capable of, during flash photography through automatic radiating direction control, quickly starting a next shooting operation when the automatic radiating direction control is suspended. A flash built in or removably mounted on a digital camera has a light-emitting unit that emits light and a drive control unit that changes a radiating direction of light from the light-emitting unit. A preparatory operation for shooting and a shooting operation by the digital camera are disabled while the radiating direction of the light from the light-emitting unit is being changed by the drive control unit. When an instruction to suspend changing the radiating direction of the light is issued, a preparatory operation for shooting and a shooting operation by the digital camera, which have been disabled, are enabled, and the drive control unit is controlled to return the light-emitting unit to an initial position prior to the change.

Abstract: An image pickup system capable of, during flash photography through automatic radiating direction control, quickly starting a next shooting operation when the automatic radiating direction control is suspended. A flash built in or removably mounted on a digital camera has a light-emitting unit that emits light and a drive control unit that changes a radiating direction of light from the light-emitting unit. A preparatory operation for shooting and a shooting operation by the digital camera are disabled while the radiating direction of the light from the light-emitting unit is being changed by the drive control unit. When an instruction to suspend changing the radiating direction of the light is issued, a preparatory operation for shooting and a shooting operation by the digital camera, which have been disabled, are enabled, and the drive control unit is controlled to return the light-emitting unit to an initial position prior to the change.

Abstract: An image pickup apparatus includes a first timer configured to start measuring a first time period when a mirror located at a mirror-up position is moved to a mirror-down position, a second timer configured to start measuring a second time period when the mirror reaches the mirror-down position, and a controller configured to enable processing when the first timer finishes measuring the first period and the second timer finishes measuring the second period. The first period is a time period enough to attenuate mirror's bounds after the mirror located at the mirror-up position starts moving to the mirror-down position, when a high power-supply voltage is set to the image pickup apparatus, and the second period is a time period enough to attenuate mirror's bounds after the mirror reaches the mirror-down position, when a low power-supply voltage is set to the image pickup apparatus.

Abstract: An image pickup apparatus includes a first timer configured to start measuring a first time period when a mirror located at a mirror-up position is moved to a mirror-down position, a second timer configured to start measuring a second time period when the mirror reaches the mirror-down position, and a controller configured to enable processing when the first timer finishes measuring the first period and the second timer finishes measuring the second period. The first period is a time period enough to attenuate mirror's bounds after the mirror located at the mirror-up position starts moving to the mirror-down position, when a high power-supply voltage is set to the image pickup apparatus, and the second period is a time period enough to attenuate mirror's bounds after the mirror reaches the mirror-down position, when a low power-supply voltage is set to the image pickup apparatus.