New Patent: Sigma 24-105mm f/2.8-4 DG OS HSM Art Lens

Sigma 24-105mm f4 DG OS HSM lens

Sigma has released the Sigma 24-105mm F/4 DG OS HSM Art Lens in late 2013, this lens is a great lens but not in stock in most stores. Today, Sigma filed a new lens patent for a similar lens in their art series: The Sigma 24-105mm f/2.8-4 DG OS HSM Art lens.

2015_55858_fig21

Explanation self interpretation of patent literature

  • Patent Publication No. 2015-55858
    • Published 2015.3.23
    • A willing Day 2013.9.13
  • Example
    embodiment
    Example Focus distance Fno. Picture angle Full length BF Lens constitution Aspheric FLD ELD SLD
    1 24.85 52.75 117.06 4.06 4.00 4.07 83.81 42.94 20.24 152.73 172.00 199.28 38.6526 54.4039 68.5866 15 20 sheets group Four faces three 1 1 0
    2 24.86 50.58 101.70 4.06 4.11 4.07 84.59 45.20 23.15 151.90 170.47 198.20 39.4591 59.1232 66.9314 14 group 19 sheets Four faces three 2 0 2
    3 24.85 50.00 101.49 2.83 3.38 4.13 83.87 45.17 23.38 160.47 178.12 205.44 40.1490 53.3326 73.3220 13 group 17 sheets Four faces three 1 4 0
    4 24.53 50.54 103.51 4.06 4.07 4.09 84.70 45.20 23.12 147.52 168.19 195.53 38.6549 67.5706 55.1266 14 group 18 sheets Four faces three 1 2 0

    Like high Y = 21.63mm

  • Sigma┬ápatents
    • Positive and negative positive and negative positive 5-group zoom
    • Anti-vibration (part of group 4)
    • Inner focus (the second group)