A ZOOM lens is a type of lens that allows the user to change the focal length, allowing for a variety of different magnifications. A CONTACT lens is a thin, curved lens that is placed directly on the eye to correct vision. A convex lens is a lens that is thicker in the middle than at the edges and causes light rays to bend inward. A telephoto lens is a type of lens that has a long focal length and is used to capture distant objects. A wideangle lens is a type of lens that has a short focal length and is used to capture a wider field of view. All of these types of lenses are kinds of lenses.