Abstract: A camera system includes a lens unit and a camera body to which the lens unit is detachably attached. The lens unit has a photographing lens, an imaging device which receives light transmitted through the photographing lens, and a lens-side connecting terminal for electric connection. The camera body has a camera-side connecting terminal which is connectable to the lens-side connecting terminal, and a movable member which is movable between a first position that is close to the camera-side connecting terminal and a second position that is far from the camera-side connecting terminal. The camera-side connecting terminal is shut in the camera body when the movable member is in the first position, and the lens unit can be attached when the movable member is in the second position.

Abstract: A camera system includes a lens unit and a camera body to which the lens unit is detachably attached. The lens unit has a photographing lens, an imaging device which receives light transmitted through the photographing lens, and a lens-side connecting terminal for electric connection. The camera body has a camera-side connecting terminal which is connectable to the lens-side connecting terminal, and a movable member which is movable between a first position that is close to the camera-side connecting terminal and a second position that is far from the camera-side connecting terminal. The camera-side connecting terminal is shut in the camera body when the movable member is in the first position, and the lens unit can be attached when the movable member is in the second position.

Abstract: A strapping structure for an optical instrument such as a camera, a video camera, a binocular and so on, which is capable of performing as more than two straps having different functions such as a grip strap and a shoulder strap. The strapping structure comprises a loop-shaped strap which is installed on the camera body, and a stopper provided on an intermediate portion of the loop-shaped strap. The stopper is shiftable along a longitudinal direction of the strap, and forms a large loop-shaped first strap serving for example as a shoulder strap and a small loop-shaped second strap serving for example as a grip strap. The loop-shaped strap, which is positioned adjacent to the camera body, is provided with a pad. This pad can be used as a pad receiving a back of hand or a shoulder pad.