This remarkable Zuiko lens sets a new standard of optical precision in zoom lens design. By using both Extra Low Dispersion glass and High Refractive Index glass lenses, Olympus developed a zoom that rivals many single focal length lenses. In the past few years this style zoom lens has become a popular all around lens for general photography. Its fast ƒ2.8 aperture allows for good low light performance, while its 35mm,80mm range gives added flexibility.