| 摘要 |
An interchangeable lens camera system having a camera body, a photographing lens, and a rear converter, the camera body and photographing lens communicating with each other via a first group of contacts and a second group of contacts, respectively, includes a group of relay channels via which the first group of contacts are electrically connected with the second group of contacts, in a state where the rear converter is mounted between the camera body and the photographing lens; a memory in which rear converter data is stored; and a controller which reads the rear converter data from the memory. The memory and the controller have a function to send the rear converter data to the camera body while the camera body and the photographing lens communicate with each other via the first group of contacts, the second group of contacts, and the group of relay channels.
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