Sigma have announced a new version of their popular macro lens. Here is the official announcement:


Image © Sigma Corporation

PRESS RELEASE

February 2011

105mm f/2.8 EX DG OS HSM

Medium telephoto macro lens incorporating Sigma’s Optical Stabiliser

The Sigma Corporation is pleased to announce the Sigma MACRO 105mm F2.8 EX DG OS HSM.

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 cloase-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 TBA

SRP TBA

Dimensions Diameter 78.3mm x Length 126.4mm

In brief:

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

For further information please contact:

Sigma Imaging (UK) Ltd, 13 Little Mundells, Welwyn Garden City Hertfordshire, AL7 1EW

Tel 01707 329999 E-Mail sales@sigma-imaging-uk.com

Website www.sigma-imaging-uk.com

End. (08/02/11).