Sigma today announced a new groundbreaking 50-100mm f/1.8 DC HSM Art APS-C lens, the first telephoto zoom lens with a constant f/1.8 aperture. The company also unveiled a 30mm f/1.4 DC DN Contemporary mirrorless lens, the first affordable f/1.4 for that segment.
Sigma has been on a tear as of late. Since late 2012, the company has put out a highly regarded 35mm f/1.4 lens, a novel USB dock that lets you calibrate lenses at home, and a revolutionary 18-35mm lens with a constant f/1.8 aperture (shown above).
It appears Sigma is only just getting warmed up: new rumors suggest that Sigma may be building a 24-70mm zoom lens for full frame cameras that boasts a constant f/2.0 aperture.