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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.</p>
<p>Patent Publication No. 2016-126280</p>
<ul>
<li>Published 2016.7.11</li>
<li>Filing date 2015.1.8</li>
<li>f 10.303 15.199 23.483</li>
<li>FNO = 3.6 -. 4.1 – 4.6</li>
<li>2ω = 111.70 – 86.59 – 62.07</li>
<li>Negative positive and negative positive</li>
<li>Anti-vibration (third group)</li>
<li>Inner focus (rear group of the first group)</li>
</ul>
<p>It’s looking like a busy fall for Tamron, and we’re hoping for the same from Sigma.</p>
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