Abstract: An optical apparatus configured to control driving of a diaphragm unit includes a setting unit configured to set a target position of an aperture blade in a diaphragm unit according to a zoom state, and a control unit configured to control a driving velocity of the diaphragm unit according to a residual driving amount by which a position of the aperture blade becomes the target position.

Abstract: The accessory apparatus includes an accessory communicator providing, with an image-capturing apparatus, three channels that are a notification channel, a first data communication channel and a second data communication channel. The image-capturing apparatus and the accessory apparatus are each configured to have a function of switching the second data communication channel between a first setting in which the data transmission from the image-capturing apparatus to the accessory apparatus is allowed and a second setting in which data transmission from the accessory apparatus to the image-capturing apparatus is allowed, The accessory controller is configured to, in response to receiving from the image-capturing apparatus through the notification channel a first notice indicating completion of switching from the first setting to the second setting in the image-capturing apparatus, switch from the first setting to the second setting in the accessory apparatus.

Abstract: An optical apparatus configured to control driving of a diaphragm unit includes a setting unit configured to set a target position of an aperture blade in a diaphragm unit according to a zoom state, and a control unit configured to control a driving velocity of the diaphragm unit according to a residual driving amount by which a position of the aperture blade becomes the target position.

Abstract: The accessory apparatus includes an accessory communicator providing, with an image-capturing apparatus, three channels that are a notification channel, a first data communication channel and a second data communication channel. The image-capturing apparatus and the accessory apparatus are each configured to have a function of switching the second data communication channel between a first setting in which the data transmission from the image-capturing apparatus to the accessory apparatus is allowed and a second setting in which data transmission from the accessory apparatus to the image-capturing apparatus is allowed, The accessory controller is configured to, in response to receiving from the image-capturing apparatus through the notification channel a first notice indicating completion of switching from the first setting to the second setting in the image-capturing apparatus, switch from the first setting to the second setting in the accessory apparatus.

Abstract: The interchangeable lens apparatus provided with an image capturing optical system and being detachably attachable to an image capturing apparatus, the image capturing apparatus being configured to detect a defocus amount of the image capturing optical system by using a signal acquired by photoelectric conversion of an optical image formed by the image capturing optical system. The interchangeable lens apparatus includes a focus lens included in the image capturing optical system, and a memory to store information on a focus sensitivity indicating a relation between a unit movement amount of the focus lens and a displacement amount of the optical image. The information on the focus sensitivity is information for enabling acquiring the focus sensitivity different depending on an image height.

Abstract: The accessory apparatus includes an accessory communicator providing, with an image-capturing apparatus, three channels that are a notification channel, a first data communication channel and a second data communication channel. The image-capturing apparatus and the accessory apparatus are each configured to have a function of switching the second data communication channel between a first setting in which the data transmission from the image-capturing apparatus to the accessory apparatus is allowed and a second setting in which data transmission from the accessory apparatus to the image-capturing apparatus is allowed, The accessory controller is configured to, in response to receiving from the image-capturing apparatus through the notification channel a first notice indicating completion of switching from the first setting to the second setting in the image-capturing apparatus, switch from the first setting to the second setting in the accessory apparatus.

Abstract: The accessory apparatus includes an accessory communicator providing, with an image-capturing apparatus, three channels that are a notification channel, a first data communication channel and a second data communication channel. The image-capturing apparatus and the accessory apparatus are each configured to have a function of switching the second data communication channel between a first setting in which the data transmission from the image-capturing apparatus to the accessory apparatus is allowed and a second setting in which data transmission from the accessory apparatus to the image-capturing apparatus is allowed, The accessory controller is configured to, in response to receiving from the image-capturing apparatus through the notification channel a first notice indicating completion of switching from the first setting to the second setting in the image-capturing apparatus, switch from the first setting to the second setting in the accessory apparatus.

Abstract: The interchangeable lens apparatus provided with an image capturing optical system and being detachably attachable to an image capturing apparatus, the image capturing apparatus being configured to detect a defocus amount of the image capturing optical system by using a signal acquired by photoelectric conversion of an optical image formed by the image capturing optical system. The interchangeable lens apparatus includes a focus lens included in the image capturing optical system, and a memory to store information on a focus sensitivity indicating a relation between a unit movement amount of the focus lens and a displacement amount of the optical image. The information on the focus sensitivity is information for enabling acquiring the focus sensitivity different depending on an image height.