Sigma is rumored to announce three new lenses: Sigma 17mm f/4 DG DN | Contemporary lens (full frame) Lens construction: 9 elements in 8 groups Minimum focusing distance: 12cm Maximum magnification: 1:3.6 Filter diameter: 55mm Size: φ64.0mm x 48.8mm (50.8mm for E-mount version) Weight: 225g( 220g for E-mount version) Magnetic metal cap Sigma 50mm f/2 … Continue reading Sigma to announce three new lenses: 17mm f/4, 50mm f/2, and 23mm f/1.4