Sigma 17mm F4 DG DN, 50mm F2 DG DN and 23mm F1.4 DC DN Lens to be Announced, Specs Leaked
Sigma will soon announce three new lenses: two lenses (Sigma 17mm F4 DG DN C and Sigma 50mm F2 DG DN C) for Full Frame and one (Sigma 23mm F1.4 DC DN C) for Aps-C.