The WebCam is an Axis 200+, a model which has unfortunately gone out of production; it has served us continously since 1999! See technical information for the camera.
Mounted on the camera's C-thread is an aftermarket lens from National Electronics. The NL412WA lens has a 4 mm focal length and an F/1.2 maximum aperture. It has an electronic iris driven automatically by the WebCam.
Since the camera is exposed to Wisconsin winters (not to mention summers), it lives in a weatherproof, thermostatically-controlled heated enclosure.