Patent of Tamron 90mm F2.8 Macro Lens

Tamron 90mm F2.8 MacroTamron 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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