18 ~ 135 mm lens belongs to what lens?

Zoom lens. 18 to 135 mm means that the shortest focal length of the lens is 18 mm and the longest focal length is 135 mm, which means that the photographer can adjust the focal length within this range, thus changing the viewing angle and shooting range. With the increase of focal length, the viewing angle will become smaller and the shooting range will become narrower, which meets the requirements of zoom lens, so it is classified as zoom lens.