Abstract: When discharge power calculated based on a current value detected by a current detector is smaller than expected maximum power, which is the maximum power expected in an actual operation, a discharge efficiency at the expected maximum power is set as a discharge efficiency used for remaining capacity calculation. This ensures that a remaining capacity based on power required for a photographing operation can be detected.

Abstract: A wireless communication system in which a master device and a slave device each performing wireless communication by a frequency hopping system can operate in synchronism with each other. In the master device, a master microcomputer outputs a first sync signal to a RTC unit after a transmission timing signal is received and a carrier frequency is changed a predetermined number of times according to a first change timing signal. In the slave device, a slave microcomputer outputs a second sync signal to a RTC unit after a reception timing signal is received and a carrier frequency is changed the predetermined number of times according to a second change timing signal.

Abstract: An image pickup apparatus configured to execute wireless communication with a flash apparatus by radio waves via a communication unit includes a signal output unit configured to output a flash start signal to the flash apparatus, a flash detection unit configured to detect a flash emitted by the flash apparatus according to the flash start signal, an acquisition unit configured to acquire a time difference between a predetermined reference timing and a timing at which the flash is regarded to have been emitted by the flash apparatus according to a result of detection by the flash detection unit, and a control unit configured to control at least one of a timing of output of the flash start signal to the flash apparatus by the signal output unit and a timing of start of an operation executed corresponding to the flash by the flash apparatus according to the time difference acquired by the acquisition unit.

Abstract: An image pickup apparatus which is capable of shooting a still image and a moving image and displaying an exposure parameter interlocking range. A light metering unit meters an object brightness. A camera microcomputer performs exposure control such that an exposure becomes equal to a target exposure determined based on a result of metering by the light metering unit. The camera microcomputer causes the image display section to display a first image representing the object brightness metered by the light metering unit and a second image representing an object brightness that can be set as the target exposure by the exposure control.

Abstract: An image pickup apparatus that enables shooting with a light emission device. An image pickup unit accumulates electric charge corresponding to an incident light. A mechanical shutter runs from an impervious position that blocks the incident light to the image pickup unit to a pervious position. An accumulation control unit controls a start timing of the accumulation of electric charge by the image pickup unit. A determination unit determines whether a communication with the light emission device is possible. A control unit controls the mechanical shutter to start running from the impervious position to the pervious position before the determination unit determines that the communication with the light emission device is possible, and controls the accumulation control unit to start accumulation of electric charge after the determination unit determines that the communication with the light emission device is possible, when shooting with the light emission device.

Abstract: When discharge power calculated based on a current value detected by a current detector is smaller than expected maximum power, which is the maximum power expected in an actual operation, a discharge efficiency at the expected maximum power is set as a discharge efficiency used for remaining capacity calculation. This ensures that a remaining capacity based on power required for a photographing operation can be detected.

Abstract: An image pickup apparatus configured to execute wireless communication with a flash apparatus by radio waves via a communication unit includes a signal output unit configured to output a flash start signal to the flash apparatus, a flash detection unit configured to detect a flash emitted by the flash apparatus according to the flash start signal, an acquisition unit configured to acquire a time difference between a predetermined reference timing and a timing at which the flash is regarded to have been emitted by the flash apparatus according to a result of detection by the flash detection unit, and a control unit configured to control at least one of a timing of output of the flash start signal to the flash apparatus by the signal output unit and a timing of start of an operation executed corresponding to the flash by the flash apparatus according to the time difference acquired by the acquisition unit.

Abstract: When discharge power calculated based on a current value detected by a current detector is smaller than expected maximum power, which is the maximum power expected in an actual operation, a discharge efficiency at the expected maximum power is set as a discharge efficiency used for remaining capacity calculation. This ensures that a remaining capacity based on power required for a photographing operation can be detected.

Abstract: An image pickup apparatus that enables shooting with a light emission device. An image pickup unit accumulates electric charge corresponding to an incident light. A mechanical shutter runs from an impervious position that blocks the incident light to the image pickup unit to a pervious position. An accumulation control unit controls a start timing of the accumulation of electric charge by the image pickup unit. A determination unit determines whether a communication with the light emission device is possible. A control unit controls the mechanical shutter to start running from the impervious position to the pervious position before the determination unit determines that the communication with the light emission device is possible, and controls the accumulation control unit to start accumulation of electric charge after the determination unit determines that the communication with the light emission device is possible, when shooting with the light emission device.

Abstract: An image pickup apparatus which is capable of shooting a still image and a moving image and displaying an exposure parameter interlocking range. A light metering unit meters an object brightness. A camera microcomputer performs exposure control such that an exposure becomes equal to a target exposure determined based on a result of metering by the light metering unit. The camera microcomputer causes the image display section to display a first image representing the object brightness metered by the light metering unit and a second image representing an object brightness that can be set as the target exposure by the exposure control.

Abstract: A battery-powered apparatus which makes it possible to perform battery check with accuracy irrespective of whether a battery is used as an internal battery or an external battery and make the end voltages of the internal battery and the external battery coincide with each other. It is determined whether the battery or an accessory having the battery incorporated therein has been attached to the apparatus, and a predetermined voltage threshold level is set based on the determination result. The voltage value of the battery or the accessory having the battery incorporated therein is detected, and the detected voltage value and the voltage threshold level are compared with each other to decide whether or not it is possible to drive the apparatus.

Abstract: A battery-powered apparatus which makes it possible to perform battery check with accuracy irrespective of whether a battery is used as an internal battery or an external battery and make the end voltages of the internal battery and the external battery coincide with each other. It is determined whether the battery or an accessory having the battery incorporated therein has been attached to the apparatus, and a predetermined voltage threshold level is set based on the determination result. The voltage value of the battery or the accessory having the battery incorporated therein is detected, and the detected voltage value and the voltage threshold level are compared with each other to decide whether or not it is possible to drive the apparatus.

Abstract: A camera system that enables to stabilize, when photographing by using a flash apparatus in a live view state, the time lag between pressing the release button and starting the imaging operation thereafter, and also enables to execute the photographing with the short time lag. Photometry is performed in first pre-light emission executed before main light emission of a flash apparatus. Photometry is performed in second pre-light emission executed between the first pre-light emission and the main light emission. shooting condition for the camera system in the second pre-light emission is set based on a photometric value in the first pre-light emission so that an output of the second photometry unit is within a predetermined range. An amount of the main light emission of the flash apparatus is determined based on the photometric value in the second pre-light emission.

Abstract: A battery-powered apparatus which makes it possible to perform battery check with accuracy irrespective of whether a battery is used as an internal battery or an external battery and make the end voltages of the internal battery and the external battery coincide with each other. It is determined whether the battery or an accessory having the battery incorporated therein has been attached to the apparatus, and a predetermined voltage threshold level is set based on the determination result. The voltage value of the battery or the accessory having the battery incorporated therein is detected, and the detected voltage value and the voltage threshold level are compared with each other to decide whether or not it is possible to drive the apparatus.

Abstract: A camera system that enables to stabilize, when photographing by using a flash apparatus in a live view state, the time lag between pressing the release button and starting the imaging operation thereafter, and also enables to execute the photographing with the short time lag. Photometry is performed in first pre-light emission executed before main light emission of a flash apparatus. Photometry is performed in second pre-light emission executed between the first pre-light emission and the main light emission. shooting condition for the camera system in the second pre-light emission is set based on a photometric value in the first pre-light emission so that an output of the second photometry unit is within a predetermined range. An amount of the main light emission of the flash apparatus is determined based on the photometric value in the second pre-light emission.

Abstract: In a system including an imaging device and a flash unit, the imaging device includes an imaging device flash start command terminal adapted to output a flash start command signal to the flash unit, and an output unit adapted to output a terminal connection check signal to the flash unit via the imaging device flash start command terminal, and the flash unit includes a flash unit flash start command terminal adapted to receive the flash start command signal from the imaging device, a detection unit adapted to detect the terminal connection check signal received from the imaging device via the flash unit flash start command terminal, and a connection state evaluation unit adapted to evaluate a terminal connection state such that the connection state evaluation unit determines that the imaging device and the flash unit are connected to each other via the imaging device flash start command terminal and the flash unit flash start command terminal in a required connection state if the detection unit detects the te

Abstract: When discharge power calculated based on a current value detected by a current detector is smaller than expected maximum power, which is the maximum power expected in an actual operation, a discharge efficiency at the expected maximum power is set as a discharge efficiency used for remaining capacity calculation. This ensures that a remaining capacity based on power required for a photographing operation can be detected.

Abstract: A flash apparatus or an image capture apparatus includes a charging unit, configured to boost a voltage of an electric source and a control unit, configured to calculate the sum of the light emission amount within a predetermined period of time. The control unit reduces the temperature rise of components which generate heat due to the continuous light emission when the sum of the light emission amount reaches a predetermined value.

Abstract: A battery-powered apparatus which makes it possible to perform battery check with accuracy irrespective of whether a battery is used as an internal battery or an external battery and make the end voltages of the internal battery and the external battery coincide with each other. It is determined whether the battery or an accessory having the battery incorporated therein has been attached to the apparatus, and a predetermined voltage threshold level is set based on the determination result. The voltage value of the battery or the accessory having the battery incorporated therein is detected, and the detected voltage value and the voltage threshold level are compared with each other to decide whether or not it is possible to drive the apparatus.

Abstract: A flash apparatus or an image capture apparatus includes a charging unit, configured to boost a voltage of an electric source and a control unit, configured to calculate the sum of the light emission amount within a predetermined period of time. The control unit reduces the temperature rise of components which generate heat due to the continuous light emission when the sum of the light emission amount reaches a predetermined value.