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Another Tamron optical patent has been found, this time for a 60mm f/2.8 VC, this follows last weeks 100-400 f/4.5-6.3 VC patent, which may have been part of the 150-600 f/5-6.3 VC development.
This optical formula is for a full frame DSLR.
Patent Publication No. 2016-126086 (Google Translated)
- Published 2016.7.11
- Filing date 2014.12.26
- 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
- Positive and negative positive
- Inner focus
- Anti-vibration (the second group)