Patent: Tamron 70-200 f/2.8 VC

Patent: Tamron 70-200 f/2.8 VC

Another new 70-200 f/2.8
It looks like Tamron is going to be refreshing their 70-200 f/2.8 with a new version. The new version will add Tamron’s vibration correction as well as a new optical design.

2012-58619,2012-58620 Patent Publication No.

  • 2012.3.22 Release Date
  • 2010.9.10 filing date

Example 1

  • 111.5353 – – 194.0928mm f = 71.5336 focal length
  • Fno 2.9
  • 20.71 – – 12.48 deg 34.66 angle of view.
  • Magnification ratio 2.713
  • 18 sheets 13 group lens configuration
  • Three three aspherical surface
  • 3 ED glass sheet
  • Super ED lens equivalent to 1 XLD glass sheets and fluorite ※

Tamron’s patent

  • Positive-positive four-group zoom of positive and negative
  • Inner Focus
  • Focusing for the third lens group
  • Made compact and lightweight AF speed of the focus group
  • Lens consists of a single sheet of focus group
  • Inner zoom
  • Shake correction
  • For anti-vibration part of the fourth lens group
  • Compact, lightweight unit
  • By a small amount of shift in anti-vibration, energy saving

Source: [EG]

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