The optical formula patents keep on coming from Tamron ahead of multiple Photokina announcements next month. This time it's a 10-24mm f/3.5-4.5 for APS-C sized sensors.
Patent Publication No. 2016-126280
- Published 2016.7.11
- Filing date 2015.1.8
- f 10.303 15.199 23.483
- FNO = 3.6 -. 4.1 – 4.6
- 2ω = 111.70 – 86.59 – 62.07
- Negative positive and negative positive
- Anti-vibration (third group)
- Inner focus (rear group of the first group)
It's looking like a busy fall for Tamron, and we're hoping for the same from Sigma.