Sigma Patents 24-70mm f/2.8 DG OS HSM | Art

According to the Egami Blog, Sigma has patented the optical formula and technology for a 24-70mm f/2.8 DG OS HSM | Art lens.

Patent Details

Patent Publication No. 2016-38502

• Published 2016.3.22
• Zoom ratio: 2.74
• Wide-angle intermediate telephoto
• Focus distance: 24.85 50.00 68.00
• F-number: 2.92 2.92 2.93
• Angle of View: 83.71 45.71 34.33
• Image height: 21.63 21.63 21.63
• The total lens length: 150.73 167.12 178.30