Give short notes on this term Zoom Lens?

A zoom lens is a feature included on many digital camers. On traditional, manual cameras, the zoom lens was attached to the primary lens or used in place of the primary lens. Most digital camers have some type of zoom lens. This allows the individual to "zoom" in on an object, somewhat like binoculars, for a closer view and photo. On traditional cameras, the zoom had to me worked manually, by turning the lens or by extending it by hand.