105mm f/2.8 EX DG OS HSM
  
    - Large aperture medium telephoto macro lens 
 
    - Sigma's proprietary Optical Stabilisation system 
 
    - 1:1 Maximum reproduction ratio 
 
    - Rounded 9 blade diaphragm creates an attractive blur
 
    - Splash proof design
 
  
The Sigma Corporation is pleased to announce that  the Sigma MACRO 105mm F2.8 EX DG OS HSM is now available in Sony AF fit. 
The successor to the Sigma MACRO 105mm F2.8 EX DG,  introduced to market in June 2004, this large aperture medium telephoto macro  lens incorporates the latest optical design technology, offering advanced  performance for 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 Sigma's  optional APO Tele Converters. Sigma's own proprietary OS (Optical Stabiliser)  function helps with handheld close-up photography and the HSM (Hyper Sonic  Motor) ensures quiet and high speed autofocus as well as full-time manual focus  capability.
This lens features a splash resistant design for use  in harsh conditions and a rounded 9 blade diaphragm creating a smooth blur to  the out of focus areas of the image.
THE  SPECIFICATIONS
| Minimum Aperture | F22 | Minimum  Focusing Distance | 31.2cm | 
| Lens Construction |  16  Elements in 11 Groups | Maximum  Magnification | 1:1 | 
| Angle of View |  23.3°  | Filter Size |  62mm | 
| No. of Diaphragm  Blades |  9  pcs | Lens  Hood |  Bayonet-type  | 
| Weight |  725g  | SRP | £649.99 | 
| Dimensions | Diameter 78.3mm x Length 126.4mm |