Accessory apparatus, image-capturing apparatus, control apparatus, lens apparatus, control method, computer program and storage medium storing computer program

An image-capturing apparatus to which an accessory apparatus is attachable, the image-capturing apparatus comprising:

• an image sensor configured to photoelectrically convert an object image formed through the accessory apparatus, and to output a first image signal;
• a detector configured to perform detection by using (a) the first image signal corresponding to a first timing, and (b) first accessory information received from the accessory apparatus;
• a calculator configured to set, based on the first timing, first time information;
• and
• a communicator configured to perform communication with the accessory apparatus,
• wherein the communicator is configured to transmit, to the accessory apparatus, (a) the first time information and (b) first ID information corresponding to the first image signal,
• wherein the communicator is configured to receive (a) the first accessory information, which is detected by the accessory apparatus based on the first time information, and (b) second ID information corresponding to a timing when the first accessory information is detected by the accessory apparatus, and
• wherein the detector is configured to perform the detection, when the first ID information and the second ID information are identical to each other.

An accessory apparatus attachable to an image-capturing apparatus, the accessory apparatus comprising:

• an image-capturing optical system;
• a communicator configured to perform communication with the image-capturing apparatus;
• and
• a detector configured to detect first accessory information,
• wherein the communicator is configured to receive (a) first time information corresponding to a first timing and (b) first ID information,
• wherein the accessory apparatus further comprises a calculator configured to set a second timing based on the first time information,
• wherein the detector is configured to detect the first accessory information at a timing corresponding to the second timing, and
• wherein the communicator is configured to transmit, to the image-capturing apparatus, the first accessory information and second ID information corresponding to a first angular velocity in relation to each other, the second ID information being identical to the first ID information.

A control method of controlling an image-capturing apparatus to which an accessory apparatus is attachable, the control method comprising the steps of:

• photoelectrically converting an object image formed through the accessory apparatus to output a first image signal;
• performing detection by using (a) the first image signal corresponding to a first timing, and (b) first accessory information received from the accessory apparatus;
• setting, based on the first timing, first time information;
• and
• performing communication with the accessory apparatus,
• wherein the step of performing communication transmits, to the accessory apparatus, (a) the first time information and (b) first ID information corresponding to the first image signal,
• wherein the step of performing communication receives (a) the first accessory information, which is detected by the accessory apparatus based on the first time information and (b) second ID information corresponding to a timing when the first accessory information is detected by the accessory apparatus, and
• wherein the detection is performed when the first ID information and the second ID information are identical to each other.

A control method of an accessory apparatus that is attachable to an image-capturing apparatus, and that includes an image-capturing optical system, the control method comprising the steps of:

• receiving (a) first time information corresponding to a first timing and (b) first ID information;
• setting a second timing based on the first time information;
• detecting first accessory information at a timing corresponding to the second timing;
• and
• transmitting, to the image-capturing apparatus, (a) the first accessory information and (b) second ID information corresponding to a first angular velocity in relation to each other, the second ID information being identical to the first ID information.