Tamron has just filed a new patent of Tamron 90mm F2.8 Macro lens. This is a macro lens for Full-Size Mirrorless camera.

•   Patent Publication No. 2015-34899
  Published 2015.2.19
  Filing date 2013.8.9
•      Example 1
  Image magnification ∞ – -0.5 – -1.0
  The focal length f = 87.783-63.669-43.402mm
  Fno. 2.880-4.325-5.770
  Image height Y = 21.633mm
  Lens construction 10 group 13 sheets
  LD 5
  Inner focus
  Floating mechanism

Source: EG

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