Patent ID: 11930271
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 10:
11. An image pickup apparatus on which an intermediate accessory apparatus configured to be detachably mounted between an interchangeable lens apparatus and the image pickup apparatus is detachably mounted, the image pickup apparatus comprising:
a processor configured to receive identification information about the interchangeable lens apparatus from the interchangeable lens apparatus via a first communication with the interchangeable lens apparatus through the intermediate accessory apparatus, transmit the identification information to the intermediate accessory apparatus via a second communication with the intermediate accessory apparatus, and receive characteristic information about a combined optical characteristic of the interchangeable lens apparatus and the intermediate accessory apparatus from the intermediate accessory apparatus via the second communication, the characteristic information being corresponding to the identification information and associated with state information indicating a state of the interchangeable lens apparatus, the state information being communicated via the first communication.