70-300 mm. f/4-5.6 DG Macro Telephoto zoom lens with excellent cost performance & optimised for use with digital SLR cameras Capable of macro photography this lens has a 1.2 maximum close-up magnification at the 300 mm. focal length. Its the ideal high performance lens for portraits sports photography nature photography & other types of photography that frequently use the telephoto range. SLD (Special Low Dispersion) glass We used SLD (Special Low Dispersion) glass in this lens for excellent correction of chromatic aberration. This also corrects for fluctuation of aberration due to focusing. The new multi layer lens coating reduces flare & ghosting a common problem with digital cameras & also creates an optimum colour balance. Macro shooting with maximum magnification 1.2 The minimum focusing distance is 1.5 m/59 inches at all zoom settings. It also has a switch for changeover to macro photography at focal lengths between 200 mm. & 300 mm. with a maximum close-up magnification from 1.2. 9 to 1.2. Without changing the distance between camera & subject you can change the shooting magnification. DG (DG Lens) These are large-aperture lenses with wide angles & short minimum focusing distances. With an abundance of peripheral illumination they are ideal lenses for Digital SLR Cameras whilst retaining suitability for traditional 3.5cm. SLRs.