A monitoring camera has a body (10), a focus ring (20), a lens (30) and an optional control cover assembly (50). The focus ring (20) has an inner flange with an inner threaded surface (24) and an outer threaded surface (23) to attach respectively to the lens (30) and the body (10). The structure allows the lens (30) to be focused over a broad range. Additionally, the control cover assembly (50) is attached to a side face of the body (10) to cover and protect multiple switches (16) on the body (10).