Sigma 50mm f/2.8 EX DG OS HSM Macro lens patent

Sigma filed a patent in Japan for a Sigma Macro 50mm f/2.8 EX DG OS HSM lens with image stabilization:

For comparison, this is the lens diagram of the current 50mm F2.8 EX DG Macro lens:

  • Patent publication: 2010-271458
  • Release date: 12/02/2010
  • Filing date: 05/20/2009
  • Focal length: 51.50mm
  • Fno (aperture): 2.915
  • Image circle: 43.260mm
  • 3 aspherical elements
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