Interchangeable lens, camera body and electronic device

Abstract

An interchangeable lens to be detachably attached to a camera body, that includes a holding unit at which a plurality of contacts is arranged, in the interchangeable lens, the first contact is arranged on one end and the eleventh contact is arranged on another end of the arrangement of the twelve contacts; the second contact is arranged next to the first contact in the arrangement of the twelve contacts; and the twelfth contact is arranged next to the eleventh contact in the arrangement of the twelve contacts.

What is claimed is: 
     
         1 . An accessory device configured to be detachably attached to a camera body, the camera body configured with a plurality of contacts, the accessory device comprising:
 a first power contact configured to be connected to a first power circuit on the camera body;   a second power contact configured to be connected to a second power circuit on the camera body;   a first group of communication system contacts configured to pass signal between the camera body; and   a second group of communication system contacts configured to pass signal between the camera body.