Obiettivo Sigma MACRO 105mm F2.8 EX DG OS HSM x Nikon

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This large aperture medium telephoto macro lens offers advanced performance of close-up photography. Sigmas own proprietary OS (Optical Stabilizer) system enables handheld close-up photography. A Special Low Dispersion (SLD) lens and one high refractive index SLD lens provide excellent correction for all types of aberration and distortion. A floating focusing system moves two different lens groups in the optical path to different positions. This system compensates for astigmatic aberration and spherical aberration and provides extremely high optical performance from infinity to 1:1 Macro.The Super Multi-Layer Coating reduces flare and ghosting, providing high contrast images. It is also possible to use this lens with Sigmas APO TELE CONVERTERS. The HSM (Hyper Sonic Motor) ensures quiet and high speed autofocus as well as full-time manual focus capability. This lens features a splash proof design for use in harsh conditions and a rounded 9 blade diaphragm creating an attractive blur to the out of focus areas of the image. Lens Construction 16 Elements in 11 Groups Angle of View 23.3 degrees Number of Diaphragm Blades 9 Mininum Aperture f22 Minimum Focusing Distance 31.2 cm / 12.3 in Filter Size (mm) Diameter 62mm Maximum Magnifications 1:1 Dimensions (Diameter x Length) 126.4 mm/3.1in.5 in Weight 725g / 25.6oz. Corresponding Mounts Nikon