The old Sigma 70 is unbeatable optically even today, in a range of 50-70 macros (zero distortions, very high and evenly distributed sharpness, very good color/contrast ratio), but absolutely outdated mechanically. If they improved, a little bit, its performance to infinity, it will be a great compromise between 50 and 90 regular/macro optical compositions. Something close to, or even better, then last great Voigtlander 65/2 lens, which is 1:2, but Sigma 70/2.8 may go to 1:1, as it was. So let us wait for first formal tests from reliable sources. LZ