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A patent showing two CN-E lenses has appeared. The first being a compact zoom CN-E 15.5-47 t2.8, which Canon announced in 2012. The second optical formula in the patent is a CN-E 18-85 t2.8, which would likely fall under the compact zoom category as well. The only other compact zoom in the cine lineup is the 30-105 t/2.8.</p>
<p>Patent Publication No. 2015-4917 (Google Translated)</p>
<ul>
<li>Published 2015.1.8</li>
<li>Filing date 2013.6.24</li>
</ul>
<p>Example 1</p>
<ul>
<li>Zoom ratio 2.80</li>
<li>Focal length 16.00 29.68 44.80</li>
<li>F number 2.80</li>
<li>Half angle (in degrees) 43.15 26.81 18.51</li>
<li>Image height 15.00</li>
<li>Overall length of the lens 263.54</li>
<li>BF 39.04</li>
</ul>
<p>Example 2</p>
<ul>
<li>Zoom ratio 4.50</li>
<li>Focal length 18.50 45.61 83.25</li>
<li>F number 2.80</li>
<li>Half angle (in degrees) 39.04 18.20 10.21</li>
<li>Image height 15.00</li>
<li>Lens length 263.78 263.78 263.78</li>
<li>BF 46.93 46.93 46.93</li>
</ul>
<p>Canon patents</p>
<ul>
<li>5-group zoom of positive and negative negative-positive-positive</li>
<li>Inner focus (part of the first group)</li>
<li>Inner zoom</li>
</ul>
