Patent ID: 7567290

Claim:
A camera system that has an imaging lens unit equipped with a photographic optical system and an image pickup device; and a camera body which is equipped with a concave mount section to removably mount the imaging lens unit, communicates with the imaging lens unit mounted in the mount section, and performs signal processing on image signals received from the imaging lens unit, wherein: the camera body comprises body-side electrical contact points installed in the mount section and used to communicate with the imaging lens unit, and a mount barrier which is connected to an electrical ground of the camera body, covers an opening in the mount section, and retreats into a recess in the mount section by being pushed by the imaging lens unit when the imaging lens unit is mounted; and the imaging lens unit comprises a push head which is connected to an electrical ground of the imaging lens unit, connects the ground of the imaging lens unit with a ground of the camera body by abutting on the mount barrier when the imaging lens unit is mounted, and pushes the mount barrier into a recess in the mount section, and lens-unit-side electrical contact points which are located farther from the camera body than the push head as viewed from the camera body with the imaging lens unit mounted and are connected with the body-side electrical contact points as the push head starts to push the mount barrier into the recess in the mount section when the imaging lens unit is mounted.