Tamron Patent for FE 90mm f/2.8 Macro Lens for Sony E-mount

Tamron has filed a patent for a new macro lens in Japan. The new patent describes the Tamron FE 90mm f/2.8 lens designed for Sony mirrorless cameras with full-frame image sensors.

Along with the FE 90mm f/2.8 Macro, Tamron has filed several new lens patents for Sony Full Frame mirrorless cameras. Pending patents are 120mm f/2.8, 60mm f/2.8, 180mm f/2.8, 300mm f/2.8 lenses.

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

When it becomes available in the market, the Tamron FE 90mm f/2.8 Macro full frame e-mount lens will sure be a cheaper alternative when compared to the Sony FE 90mm f/2.8 G OSS lens.

Tamron FE 90mm f/2.8 Full Frame Mirrorless Lens Details

Explanation self interpretation of patent literature

• Patent Publication No. 2015-75508
  • Published 2015.4.20
  • Filing date 2013.10.7
• Example
  

  embodiment

  Example	Focal distance	Fno.	Half angle	Shooting magnification
  One	92.742 67.284 43.796	2.880 4.325 5.770	12.654	∞ -0.5 -1.0
  Two	116.425 85.947 55.216	2.880 4.325 5.770	10.221	∞ -0.5 -1.0
  Three	61.833 56.303 42.747	2.880 4.325 5.770	19.343	∞ -0.5 -1.0
  Four	174.569 102.029 63.465	2.880 4.325 5.770	6.842	∞ -0.5 -1.0
  Five	290.995 150.108 92.448	2.880 4.325 5.770	4.176	∞ -0.5 -1.0

  Image height Y = 21.633mm

• Tamron patent
  • 3-group configuration of positive and negative positive
  • Inner focus (the second group)

via: EG