Asobinet found a patent for a Sigma 18-50mm f/2 DC DN that might have been in the works while the Sigma 18-50mm f/2.8 DC DN Contemporary was under development. It is unlikely we will see this interesting f/2 zoom anytime soon, but maybe Sigma will go back to it if f/2 zooms become popular. The … Continue reading Sigma 18-50mm f/2 DC DN Patent Found