This lens has a 1:2 maximum close-up magnification at the 300mm focal length. Excellent performance telephoto zoom lens for digital and 35mm SLR cameras. It also has a switch for changeover to macro photography at focal lengths between 200mm and 300mm. The minimum focusing distance is 1.5m (59.1 inches) at all zoom settings. We used SLD (Special Low Dispersion) glass in this lens for excellent correction of chromatic aberration. It is effectively corrected for fluctuation of aberration due to focusing