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<p>A patent for an optical formula showing a wide angle zoom lens for a full frame mirrorless body has appeared.</p>
<p>It looks like this patent is for a 16-30mm f/2.8 and has a short backfocus of 11.34mm, which tells us it’s not for a DSLR.</p>
<p><strong>Canon 16-30mm f/2.8 Specifications:</strong> (Japan Patent Application 2018-077320)</p>
<ul>
<li>Zoom ratio: 1.67</li>
<li>Focal length: 16.48-27.44mm</li>
<li>F number: 2.88</li>
<li>Half angle: 52.70 – 38.25</li>
<li>Image height: 21.64mm</li>
<li>Back focus: 12.33 – 10.00mm</li>
</ul>
<p> </p>
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