Tamron Patent for 28mm, 50mm and 60mm f/2.8 Lenses for Sony FE-mount

Tamron has filed a patent for a several new prime lenses in Japan. The new patent describes the Tamron SP 28mm f/2.8 VC, SP 50mm f/2.8 VC and SP 60mm f/2.8 VC lenses designed for Sony mirrorless cameras with full-frame image sensors.

As we’ve posted earlier, the company has pending patents filed like the FE 90mm f/2.8 Macro, 120mm f/2.8, 180mm f/2.8, and 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.

Tamron 28mm, 50mm and 60mm f/2.8 Full Frame Mirrorless Lens Details

According to patent application all three lenses will have in lens stabilization featuring 6 group and 7 lens design. They will also have a close focusing distance of 30cm.

Description, self-interpretation of the patent literature

• Patent Publication No. 2015-163926
  • Published 2015.9.10
  • Filing date 2014.2.28
• Example
  

  embodiment

  Example	Focal length	Fno.	Half angle	Image height	BF	Minimum focusing distance	Lens constitution	Aspheric surface	LD
  1	27.5462 26.0246	2.8840 2.8985	38.5881 38.3233	20.29 21.07	15.6482 15.6482	300	6 groups seven	6 surface 3 sheets	0
  2	48.4962 40.8401	2.8840 2.9589	21.9113 20.7990	21.63 21.63	16.1817 16.1817	300	6 groups seven	6 surface 3 sheets	1
  Three	58.5031 46.1351	2.8840 3.0166	18.4621 17.3034	21.63 21.63	20.1130 20.1130	300	6-group, six	6 surface 3 sheets	Three

• Tamron patent
  • Of positive and negative negative 3-group configuration
  • Inner focus (the second group)
  • Vibration control
  • Video support

via Egami