In various embodiments of the present disclosure, there is provided an endoscope including: an elongate shaft body； an optical scope provided within the elongate shaft body, the optical scope comprising an optical aperture provided at the distal end of the optical scope, corresponding to a distal end of the elongate shaft body； an aperture cover provided at the distal end of the elongate shaft body for shielding the optical aperture from debris external to the elongate shaft body； and an actuation system provided at a proximal end of the elongate shaft body； wherein the actuation system drives the aperture cover to rotate.
