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

Sigma has filed a new patent in Japan. The new patent refers to a Sigma 24-105mm f/2.8-4 DG OS HSM Art lens designed for DSLR cameras with full-frame image sensors.

Sigma announced and added the 24-105mm f/4 DG OS HSM Art full frame lens to their lineup in late 2013.

Now a more bright aperture at 24mm focal length version appeared in a filed patent.

See below for patent details.

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

sigma-24-105mm-f2-8-4-dg-os-hsm-art-lens-patent

This is the current Sigma 24-105mm f/4 DG OS HSM full-frame standard zoom lens with optical image stabilisation and a quiet “hypersonic” focus motor.

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

via Egami