Telephoto zoom lenses with tele-macro function and optimised for digital SLR cameras The performance telephoto zoom lens is capable of shooting with a maximum magnification of 1:2 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 range. SLD (Special Low Dispersion) glass This lens has two SLD glass elements in the front lens group and one in the rear lens group, the lens has excellent correction of chromatic aberration through the entire zoom range. This new DG lens is capable of macro photography with a 1:2 maximum magnification at the focal length of 300 mm. The new multi layer lens coating reduces flare and ghost, which is a common problem with digital cameras and also creates an optimum colour balance Macro shooting with maximum magnification 1:2 High optical performance is demonstrated throughout the entire zoom range. It also has a switch that converts the lens to macro photography at focal lengths between 200mm and 300mm with a minimum focusing distance of 95cm (37.4 inches). In normal mode the minimum focusing distance is 150cm (59.1 inches) at all zoom settings. Maximum magnification between 200mm and 300mm is 1:2.9 to 1:2.