Sigma’s new 45mm F2.8 DG DN Contemporary lens is a compact, standard prime lens for full-frame Sony, Leica and Panasonic mirrorless cameras. The lens is just 46mm (1.8″) long and weighs 215g (7.6oz), but still has a metal lens barrel and weather-sealing. It contains eight elements, a seven-blade aperture and 24cm (9.4″) minimum focus distance. The 45mm has an aperture ring, as well.
…
Read full post here:
https://www.dpreview.com/news/0429724418/lightweight-sigma-45mm-f2-8-dg-dn-for-l-mount-and-e-mount-announced