Sigma 400mm f/2.8 DG OS HSM Sports Lens Patent

The Sigma 200-500mm f/2.8
The Sigma 200-500mm f/2.8

Sigma has just filed a new super telephoto prime lenses: Sigma 400mm f/2.8 DG OS HSM Sports Lens. This new lens should be much cheaper than Canon and Nikon version.


  • Patent Publication No. 2015-64436
    • Published 2015.4.9
    • Filing date 2013.9.4
  • Example 1
    • Focal length 390.00mm
    • Fno. 2.91
    • Total angle of view 2ω 6.29 °
    • Image height Y 21.63mm
    • Overall length of the lens 353.00mm
    • Positive, positive positive and negative negative 5-group configuration
    • Inner Focus (fourth group)
    • Anti-vibration (part of the fifth group)

via: eg

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