The previously rumored Sigma 28-105mm f/2.8 DG DN Art lens for Sony E and Leica L mount leaked a few hours before the official announcement: Lens structure: 13 groups and 18 lenses (including 2 FLD fluorite-grade low-dispersion lenses, 1 SLD special low-dispersion lens, and 5 aspherical lenses) Maximum aperture: F2.8 Minimum aperture: F22 Aperture blade … Continue reading Sigma 28-105mm f/2.8 DG DN Art lens leaked before the official announcement (for Sony E and Leica L mount)