A lens with a high zoom factor usually also requires a compact housing and outstanding other features in order to be used comfortably and versatilely in a wide variety of shooting situations. Image quality is what matters the most. When travelling with minimal photographic equipment, the lens requires a wide focal length range, especially when a telephoto lens is unexpectedly needed and there is no time to change lenses. Even with a mega zoom lens, the goal is to satisfy enthusiastic photographers with the versatility of such a lens and its optical performance.