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Tamron FE 85mm f/1.8 VC Lens Patent for Sony Full Frame Mirrorless

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Tamron has filed a patent for a new hort-telephoto prime lens in Japan. The new patent describes the Tamron FE 85mm f/1.8 VC lens designed for Sony mirrorless cameras with full-frame image sensors.

The lens in the patent application features an 85mm focal length along with a maximum aperture of f/1.8 and built-in image stabilization technology.

On the other hand the internal design of the Tamron 85mm f/1.8 VC lens patent is identical to the one of the Batis 1.8/85 lens. That’s why this lens could also be the recently-announced Zeiss Batis Sonnar T* 85mm f/1.8.


Tamron FE 85mm f/1.8 VC Lens Patent

This would be good news for the current Sony A7-series FE-mount users. As Tamron produce such good lenses with an affordable price. See the image and patent details below.

Explanation and self-interpretation of the patent literature

  • Patent Publication No. 2015-96915
    • Published 2015.5.21
    • Filing date 2013.11.15
  • Example 1
    • Focal length f = 82.87-82.02-77.72mm
    • Fno. 1.85-1.88-2.01
    • Full field angle 2ω = 28.59-27.41-23.18 °
    • FB 18.04mm
    • Lens configuration 8 groups 11 sheets
    • LD 1
  • Tamron patent
    • Of positive and negative negative 3-group configuration
    • Inner focus (the second group)
    • Anti-vibration (Group 3)

via: Egami