Tamron is working on fullframe DSLR lens, the prime lens have 60mm fixed focal length and a constant F2.8 aperture.
Description, self-interpretation of the patent literature
- Patent Publication No. 2016-126086
- Published 2016.7.11
- Filing date 2014.12.26
- Example
- Focal length 61.79 61.21 56.74
- FNO 2.88 2.92 3.16
- 2ω (angle of view) 38.58 38.03 34.57
- Tamron patent
- Positive and negative positive
- Inner focus
- Anti-vibration (the second group)
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