New patents: Sigma 135mm f/1.8 DG DN lens and new Tamron 16-70mm, 20-72mm, 28-72mm (all f/4.0) Full Frame lenses – sonyalpharumors

info patent 135mm F1.8 DG DN
Image on top shows the Sigma 135mm f/1.8 DG DN lens construction

Today four new Full Frame lens patents surfaced in Japan:

  1. Sigma 135mm f/1.8 DG DN
  2. Tamron 16-70mm f/4.0
  3. Tamron 20-72mm f/4.0
  4. Tamron 28-72mm f/4.0

The Sigma would be certainly a nice and cheaper alternative to the Sony 135mm GM. And the 28-75mm f/4.0 would make sense as cheap travelzoom option.

via Asobinet and Hi Lows Note

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