[Dave]

TIPA 2007 Award for Best Expert Lens in Europe goes to the Sigma 70mm F2.8 EX DG Macro lens.

Press Release:Sigma win TIPA Award
TIPA (Technical Image Press Association) is comprised of 31 publications from 12 countries. The knowledgeable chief editors and technical editors from these publications form the judging panel for the awards. Photo Imaging has been a prominent part of the TIPA awards since 1991.

TIPA has stated that "Chromatic aberration is absent, distortion and vignetting are invisible, and the optics achieve a 1:1 reproduction ratio at the minimum focusing distance of 25cm. A great reference lens at an affordable price."

The 70mm F2.8 EX DG Macro lens is compatible with film, full frame and APS-C size digital SLRs. The use of SLD lens elements provide excellent correction for all types of aberrations and an exceptional level of sharpness and resolution and all for the price of £339.99. Available in Sigma AF, Canon AF, Nikon AF-D, Sony AF and Pentax AF SLR cameras.

[Dave]

Begs the question, why spend more on your Canon / Nikon lenses