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The first high speed, tele macro lens for Nikon digital and film SLR cameras -- shoot up to 1:1. The maximum lens aperture is F2.8. Two Special Low Dispersion (SLD) glass elements control various color aberrations and assure high image quality. A floating focusing system moves two different lens groups in the optical system to different positions. This system compensates for astigmatic aberration and spherical aberration. And, the high-speed motor (HSM) provides ultra quiet high-speed autofocusing as well as full-time manual focus override.
