Tamron Patents 70-200mm f/4 VC Lens

According to the Egami Blog, Tamron has patented the optical formula for a 70-200mm f/4 VC lens.
 
Description of Patent
 

  • Patent Publication No. 2016-126278
  • Published 2016.7.11
  • Submitted 2015.1.8
  • Focal length 71.8092 109.9915 205.9615
  • F-number 4.0989 4.1033 4.1023
  • Field of View 16.7567 10.8972 5.8621
  • Inner zoom
  • Inner focus
  • Vibration control

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