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

Claim 22:
23. An intermediate accessory apparatus configured to be detachably mounted between an interchangeable lens apparatus and an image pickup apparatus, the intermediate accessory apparatus comprising:
a storage configured to store 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;
a processor configured to transmit characteristic information about the combined optical characteristic of the interchangeable lens apparatus and the intermediate accessory apparatus to the image pickup 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 identification information of the interchangeable lens apparatus and state information of the interchangeable lens apparatus are transmitted from the interchangeable lens apparatus to the image pickup apparatus via the first communication channel,
wherein identification information of the interchangeable lens apparatus is transmitted from the image pickup apparatus to the intermediate accessory apparatus via the second communication channel, and
wherein the processor transmits 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, to the image pickup apparatus via the second communication channel.