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The following patent is most likely for the EF-M range of lenses. Also appearing alongside the 16-120 IS STM in the patent is an 18-55 IS STM and an 18-200 f/3.5-6.3 IS STM.</p>
<ul>
<li><span>Patent Publication No. 2013-257507</span>
<ul>
<li><span>Publication date 2013.12.26</span></li>
<li><span>Filing date 2012.6.14</span></li>
</ul>
</li>
<li><span>Example 1</span>
<ul>
<li><span>Zoom ratio 2.87</span></li>
<li><span>Focal length f = 18.58 – 27.82 – 53.36mm</span></li>
<li><span>Fno 3.60 -. 4.27 – 5.69</span></li>
<li><span>Half angle ω = 36.33 – 26.15 – 14.36 °</span></li>
<li><span>Image height Y = 13.66mm</span></li>
<li><span>86.23 – - 104.79mm 78.22 overall length of the lens</span></li>
<li><span>BF 0.50mm</span></li>
<li><span>13 pieces of 11-group lens configuration</span></li>
<li><span>Three four-sided aspherical</span></li>
</ul>
</li>
<li><span>Example 3</span>
<ul>
<li><span>Zoom ratio 10.39</span></li>
<li><span>Focal length f = 18.60 – 60.12 – 193.23mm</span></li>
<li><span>Fno 3.55 -. 5.59 – 6.60</span></li>
<li><span>Half angle ω = 36.29 – 12.80 – 4.04 °</span></li>
<li><span>Image height Y = 13.66mm</span></li>
<li><span>151.48 – - 184.39mm 118.58 overall length of the lens</span></li>
<li><span>BF 0.50mm</span></li>
<li><span>18 pieces of 14-group lens configuration</span></li>
<li><span>Three three-sided aspherical</span></li>
<li><span>One UD glass</span></li>
</ul>
</li>
<li><span>Example 4</span>
<ul>
<li><span>Zoom ratio 7.14</span></li>
<li><span>51.87 – - 117.70mm 16.48 focal length</span></li>
<li><span>Fno 3.60 -. 5.30 – 5.88</span></li>
<li><span>Half angle ω = 39.65 – 14.75 – 6.62 °</span></li>
<li><span>Image height Y = 13.66mm</span></li>
<li><span>138.55 – - 162.35mm 114.75 overall length of the lens</span></li>
<li><span>BF 0.50mm</span></li>
<li><span>17 pieces of 13-group lens configuration</span></li>
<li><span>Two two-sided aspherical</span></li>
<li><span>One UD glass</span></li>
</ul>
</li>
<li><a href="http://egami.blog.so-net.ne.jp/tag/Canon"><span>Canon</span></a><span> patents</span>
<ul>
<li><span>Vibration control</span></li>
<li><span>Inner focus</span></li>
</ul>
</li>
</ul>
<p>Source: [<a href="http://egami.blog.so-net.ne.jp/2013-12-29" target="_blank">EG</a>]</p>
<p><strong><span style="color: #ff0000;">c</span>r</strong></p>
