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
