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<strong>All at once!
</strong>Canon has filed patents for a bunch of fast aperture telephoto lenses.</p>
<p>We’ve heard a number of times that Canon will update a lot of current lenses in 2012 and beyond. I think the 50 f/1.4 is the one that is in the most dire need of an update. An 85 1.2L III with a faster AF would also be welcomed. I hope they don’t update the 200 f/2L IS, I already love it and I would be forced to love the next one too at $6K+.</p>
<ul>
<li>50 f/1.4</li>
<li>85 f/1.8</li>
<li>85 f/1.2</li>
<li>100 f/2</li>
<li>135 f/2</li>
<li>200 f/2</li>
</ul>
<p><strong>Patent literature, self-interpretation and summary</strong></p>
<ul>
<li>Patent Publication No. 2011-253050</li>
<li>Published 2011.12.15</li>
<li>Filing date 2010.6.2</li>
</ul>
<table summary="実施例" frame="box" rules="all">
<caption><span><span>Example</span></span></caption>
<thead>
<tr>
<th><span><span>Example</span></span></th>
<th><span><span>Focal length</span></span></th>
<th><span><span>Fno</span></span></th>
<th><span><span>Length Lens</span></span></th>
<th><span><span>BF</span></span></th>
<th><span><span>Lens Construction</span></span></th>
</tr>
</thead>
<tbody>
<tr>
<td><span><span>One</span></span></td>
<td><span><span>85.00</span></span></td>
<td><span><span>1.24</span></span></td>
<td><span><span>126.06</span></span></td>
<td><span><span>39.13</span></span></td>
<td><span><span>Nine elements in 7 groups</span></span></td>
</tr>
<tr>
<td><span><span>Two</span></span></td>
<td><span><span>85.00</span></span></td>
<td><span><span>1.80</span></span></td>
<td><span><span>113.00</span></span></td>
<td><span><span>42.34</span></span></td>
<td><span><span>Nine elements in 7 groups</span></span></td>
</tr>
<tr>
<td><span><span>Three</span></span></td>
<td><span><span>100.00</span></span></td>
<td><span><span>2.00</span></span></td>
<td><span><span>120.00</span></span></td>
<td><span><span>42.27</span></span></td>
<td><span><span>Nine elements in 7 groups</span></span></td>
</tr>
<tr>
<td><span><span>Four</span></span></td>
<td><span><span>133.30</span></span></td>
<td><span><span>2.06</span></span></td>
<td><span><span>158.90</span></span></td>
<td><span><span>51.86</span></span></td>
<td><span><span>10 sheets in 7 groups</span></span></td>
</tr>
<tr>
<td><span><span>Five</span></span></td>
<td><span><span>196.00</span></span></td>
<td><span><span>2.05</span></span></td>
<td><span><span>223.50</span></span></td>
<td><span><span>50.00</span></span></td>
<td><span><span>15 pieces in 10 groups</span></span></td>
</tr>
<tr>
<td><span><span>Six</span></span></td>
<td><span><span>51.70</span></span></td>
<td><span><span>1.41</span></span></td>
<td><span><span>89.92</span></span></td>
<td><span><span>39.00</span></span></td>
<td><span><span>Eight elements in 7 groups</span></span></td>
</tr>
</tbody>
</table>
<p><span><span>Both the image height is 21.64mm (full size)</span></span></p>
<p>Read More at <a href="http://photorumors.com/2011/12/15/canon-files-patents-for-50mm-f1-4-85mm-f1-2-85mm-f1-8-100mm-f2-135mm-f2-and-200mm-f2-lenses/">Egami</a>(Japanese)</p>
<p><strong>Source:</strong> [<a href="http://photorumors.com/2011/12/15/canon-files-patents-for-50mm-f1-4-85mm-f1-2-85mm-f1-8-100mm-f2-135mm-f2-and-200mm-f2-lenses/">PR</a>] via [<a href="http://egami.blog.so-net.ne.jp/2011-12-16">EG</a>]</p>
