Sigma has announced that the dp1 Quattro, a large-sensor compact that will be available from mid-October. The dp1 Quattro marries a 28mm equivalent F2.8 lens to the latest generation of Sigma’s Foveon technology. The dp1 Quattro joins the 40mm equivalent dp2 Quattro in the company’s lineup, with the promise of a 75mm equivalent dp3 Quattro to follow. Read more