Telephoto zoom lenses with tele macro function and optimised for digital slr camerasthe performance telephoto zoom lens is capable of shooting with a maximum magnification of 12 at the focal length of 300 mm its the ideal lens for portraits sports photography nature photography and other types of photography that frequently use the telephoto rangesld special low dispersion glassthis lens has two sld glass elements in the front lens group and one in the rear lens group the lens has excel