The present disclosure relates to an imaging system, a control method, and a program that make it possible to implement setting for an external flash by an operation on a camera side. Setting coordination processing is executed in which: setting information of an external flash (13) is transmitted and received between a first communication unit (67A) and a second communication unit (47); a second display unit is caused to display a setting screen to be used for setting a setting item of the external flash; and the setting information changed by an operation on the second operation unit is caused to be transmitted from the imaging device (12) to the external flash (13) via the first communication unit (67A) and the second communication unit (47), and a setting for the external flash (13) is caused to be applied. The present technology can be applied to, for example, an imaging system (11) including an external flash (13) and an imaging device (12).

Example implementations relate the selective defocus of cameras. For instance, in an example an electronic device including a camera including a lens having a field of view and a focal distance, a defocus switch, and an actuator to adjust the focal distance of the lens to selectively defocus a portion of the field of view of the lens in response to actuation of the defocus switch.

A mounting apparatus on which an accessory including a first mount is mountable, comprising: a second mount that is capable of coupling to the first mount of the accessory; terminals disposed along a circumferential direction of the second mount and used for electrical connection with corresponding terminals provided on the accessory; and mount claws for engaging with claws provided in the accessory. A terminal holder has first and second stages at different positions in a direction parallel to a center-axis direction of the second mount. The terminals include a first terminal for detecting mounting of the accessory and a second terminal for supplying communication power to the accessory. The second stage is projecting toward the accessory further than the first stage in a state where the accessory is mounted on the mounting apparatus.

A mounting apparatus on which an accessory including a first mount is mountable, comprising: a second mount that is capable of coupling to the first mount of the accessory; terminals disposed along a circumferential direction of the second mount and used for electrical connection with corresponding terminals provided on the accessory; and mount claws for engaging with claws provided in the accessory. A terminal holder has first and second stages at different positions in a direction parallel to a center-axis direction of the second mount. The terminals include a first terminal for detecting mounting of the accessory and a second terminal for supplying communication power to the accessory. The second stage is projecting toward the accessory further than the first stage in a state where the accessory is mounted on the mounting apparatus.

Example implementations relate the selective defocus of cameras. For instance, in an example an electronic device including a camera including a lens having a field of view and a focal distance, a defocus switch, and an actuator to adjust the focal distance of the lens to selectively defocus a portion of the field of view of the lens in response to actuation of the defocus switch.

An image pickup device includes a notification channel and a data communication channel for communication with an accessory device, the notification channel being used for signal transfer between the image pickup device and the accessory device, the data communication channel being used for data communication between the image pickup device and the accessory device. The image pickup device starts the communication with the accessory device when a voltage level of the notification channel takes a predetermined level.

A blade driving device includes a blade for covering an opening for an imaging device operable through motor driving and a user manual operation. A blade driving device includes a base with an opening for an imaging device, a movable member movable relative to the base in X-direction and including a slider held on the base and movable in X-direction, a blade connected to the slider, and a knob on a side of the base opposite to the slider and operable to move the blade, a motor that moves the movable member in X-direction until the blade covers or uncovers the opening in the base, and a lead screw and a driving member that transmit rotation of the motor to the slider in the movable member to move the movable member.

There is provided a lens device that prevents dust from entering a space in which a movable lens is moved. A movable lens is moved in the direction of an optical axis. A holding member, which extends in the direction of the optical axis, is formed at an end portion of the movable lens. A magnet is fixed to an end portion of the holding member. A hall IC is disposed in a closed storage space at a position facing the magnet. A signal, which corresponds to the position of the magnet in the direction of the optical axis, is output from the hall IC. Since the hall IC is disposed in the storage space closed by a storage box, the entry of dust, which is caused by the hall IC, into a space in which the movable lens is moved is prevented.

A blade driving device includes a blade for covering an opening for an imaging device operable through motor driving and a user manual operation. A blade driving device includes a base with an opening for an imaging device, a movable member movable relative to the base in X-direction and including a slider held on the base and movable in X-direction, a blade connected to the slider, and a knob on a side of the base opposite to the slider and operable to move the blade, a motor that moves the movable member in X-direction until the blade covers or uncovers the opening in the base, and a lead screw and a driving member that transmit rotation of the motor to the slider in the movable member to move the movable member.

An image pickup device includes a notification channel and a data communication channel for communication with an accessory device, the notification channel being used for signal transfer between the image pickup device and the accessory device, the data communication channel being used for data communication between the image pickup device and the accessory device. The image pickup device starts the communication with the accessory device when a voltage level of the notification channel takes a predetermined level.