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<p><strong>New Coating

</strong>Below seems to be a patent for large protruding front elements, that will help with issues of reflection and cleaning. This could possibly appear in the much talked about EF 14-24 f/2.8L.</p>
<p> </p>
<p><strong>Patent Publication No. 2012-159723</strong></p>
<ul>
<li>2012.8.23 Release Date</li>
<li>2011.2.1 filing date</li>
</ul>
<p><strong>Example 1</strong></p>
<ul>
<li>F = 14.3mm focal length</li>
<li>Fno. = 2.89</li>
<li>Half angle ω = 56.6 °</li>
<li>14 images in 10 groups lens configuration</li>
<li>Existing coating roughness</li>
<li>Will making cleaning the front element easier and possibly less destructive</li>
</ul>
<p><strong>Canon patent</strong></p>
<ul>
<li>(Coating applied to one surface of a lens) thin film layer</li>
<li>Having a plurality of tubular spaces are arranged parallel to the tube</li>
<li>Maximum opening diameter of the tubular space below 400nm</li>
<li>The inorganic oxide materials (silica, titania)</li>
</ul>
<div>Source: [<a href="http://egami.blog.so-net.ne.jp/2012-09-19" target="_blank">EG</a>]</div>
<p><strong><span style="color: #ff0000;">c</span>r</strong></p>