An endoscopic viewing system including a powered zoom coupler. The coupler is
configured to attach the camera to a proximal end of an endoscope. The coupler
includes a plurality of lenses that are positioned within a sleeve. The coupler
includes a first motor and a second motor. Each of the first motor and the second
motor move at least a portion of the plurality of lenses with respect to the sleeve.
The coupler can optically focus and magnify the image applied to a camera.
