https://www.youtube.com/watch?v=qTSkz7mg7fI Sigma completed the construction of there magnesium factory and is one of the few manufacturers to have their own magnesium factory. Some of the lenses being announced rely on this factory Sigma announced new lenses: 28mm F1.4 DG HSM | Art A high-quality lens of the Art line with a brightness of F1.4, with a […]