Patent ID: 11892754
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An adapter apparatus to which the camera and interchangeable lens apparatus are capable to be connected, the adapter apparatus comprising:
a relay channel for forming part of a camera-lens communication channel used for a communication between the camera and the interchangeable lens apparatus;
an adapter-camera communication controller configured to communicate with the camera by using a camera-adapter communication channel provided separately from the relay channel; and
an operation member that is operated by a user,
wherein the camera-lens communication channel includes a first data communication line used during a data communication, a second data communication line used during a data communication and a first notification line used for a notification of a timing of a communication between the camera and the interchangeable lens apparatus,
wherein the camera-adapter communication channel consists of a third data communication line used during a data communication and a second notification line used for a notification of a timing of a communication between the camera and the adapter apparatus, and
wherein operation data of the operation member is transmitted via the third data communication line.