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

Claim 25:
26. 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,
wherein the intermediate accessory apparatus stores characteristic information about a combined optical characteristic of the interchangeable lens apparatus and the intermediate accessory apparatus, being associated with identification information of the interchangeable lens apparatus and state information of the interchangeable lens apparatus,
the image pickup apparatus comprising:
a processor configured to receive identification information of the interchangeable lens apparatus and state information of the interchangeable lens apparatus from the interchangeable lens apparatus, and receive characteristic information about the combined optical characteristic of the interchangeable lens apparatus and the intermediate accessory apparatus from the intermediate accessory apparatus;
a first communication terminal that constitutes a first communication channel used for communication between the image pickup apparatus and the interchangeable lens apparatus; and
a second communication terminal that constitutes a second communication channel which is different from the first communication channel, used for communication between the image pickup apparatus and the intermediate accessory apparatus,
wherein the processor:
receives identification information of the interchangeable lens apparatus and state information of the interchangeable lens apparatus from the interchangeable lens apparatus via the first communication channel,
transmits identification information of the interchangeable lens apparatus to the intermediate accessory apparatus via the second communication channel, and
receives characteristic information about the combined optical characteristic of the interchangeable lens apparatus and the intermediate accessory apparatus, corresponding to identification information of the interchangeable lens apparatus and being associated with state information of the interchangeable lens apparatus, from the intermediate accessory apparatus via the second communication channel.