The next lens from Sigma will be the Sigma 18-50mm f/2.8 DC DN | Contemporary, and Nokishita just leaked the first details.
Sigma “18-50mm F2.8 DC DN | Contemporary” L mount version has 13 elements in 10 groups, minimum shooting distance 12.1cm (wide angle) / 30cm (telephoto), maximum shooting magnification 1: 2.8( Wide angle) / 1: 5 (telephoto), filter diameter 55mm, size φ65.4 × 74.5mm (E-mount version φ61.6×76.5mm), weight 290g.
via Nokishita