Patent: CN-E 20-100 T2.8 & CN-E 20-120 T2.8-T3.5

Canon Rumors Guy

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Here we have another patent for more cine lens optical formulas. This time for two lenses, a CN-E 20-100 T2.8 and a CN-E 20-120 T2.8-T3.5.</p>
<p>I’m starting to think we’re going to see some new cinema lenses this fall once the <a href="http://www.bhphotovideo.com/c/search/atclk/Ntt/C300+Mark+II/N/0/InitialSearch/yes/sts/ma/Top+Nav-Search/BI/2466/KBID/3296/DFF/d10-v1-t14" target="_blank">EOS C300 Mark II begins shipping</a>.</p>
<p>Patent Publication No. 2015-18083 (Google Translated)</p>
<ul>
<li>Published 2015.1.29</li>
<li>Filing date 2013.7.10</li>
</ul>
<p><!--more--></p>
<p>Example 1</p>
<ul>
<li>Zoom ratio 6.00</li>
<li>Focal length 21.00 87.93 125.94</li>
<li>F number 2.77 2.77 3.66</li>
<li>Half angle of 35.54 9.68 6.79</li>
<li>Image height 15.00</li>
<li>Overall length of the lens 314.76</li>
<li>BF 50.03</li>
<li>Example 2</li>
</ul>
<p>Zoom ratio 5.00</p>
<ul>
<li>Focal length 20.00 69.46 100.00</li>
<li>F number 2.76 2.77 2.77</li>
<li>Half angle of 36.50 12.03 8.42</li>
<li>Image height 14.80</li>
<li>Overall length of the lens 294.44</li>
<li>BF 50.07</li>
</ul>
<p>Canon patents</p>
<ul>
<li>Positive and negative positive and negative positive five-group zoom</li>
<li>Inner focus (part of the first group)</li>
<li>Inner zoom</li>
</ul>