Sigma has announced an update the its 50mm f1.4 and now with the Art label.
Specifications
Lens Construction: 13 Elements in 8 Groups
Angle of View: 46.8º
Number of Diaphragm Blades: 9
Mininum Aperture: f16
Minimum Focusing Distance: 40 cm / 15.7 in
Filter Size (mm): 77mm
Maximum Magnifications: 1: 5.6
Dimensions Diameter x Length): 85.4 x 99.9 mm/ 3.4 x 3.9 in Weight 470g / 16.6oz.
http://photorumors.com/2014/01/06/sigma-50mm-f1-4-dg-hsm-art-and-18-200mm-f3-5-6-3-dc-macro-os-hsm-lenses-announced/
Specifications
Lens Construction: 13 Elements in 8 Groups
Angle of View: 46.8º
Number of Diaphragm Blades: 9
Mininum Aperture: f16
Minimum Focusing Distance: 40 cm / 15.7 in
Filter Size (mm): 77mm
Maximum Magnifications: 1: 5.6
Dimensions Diameter x Length): 85.4 x 99.9 mm/ 3.4 x 3.9 in Weight 470g / 16.6oz.
http://photorumors.com/2014/01/06/sigma-50mm-f1-4-dg-hsm-art-and-18-200mm-f3-5-6-3-dc-macro-os-hsm-lenses-announced/