HTML:
<div id="fb_share_1" style="float: right; margin-left: 10px;"><a name="fb_share" type="box_count" share_url="http://www.canonrumors.com/2011/04/sigma-500-f4-patent/" href="http://www.facebook.com/sharer.php">Share</a></div><div><script src="http://static.ak.fbcdn.net/connect.php/js/FB.Share" type="text/javascript"></script></div><div class="tweetmeme_button" style="float: right; margin-left: 10px;"><a class="tm_button" rel="&style=normal&b=2" href="http://www.canonrumors.com/2011/04/sigma-500-f4-patent/"></a></div>We <a href="http://www.canonrumors.com/2011/03/more-sigma-primes-coming-cr1/">previously reported</a> Sigma would be updating some of their large primes.</p>
<p>[<a href="http://photorumors.com/2011/04/08/sigma-patents-500mm-f4-lens/#more-9606">PR</a>] via [<a href="http://translate.google.com/translate?js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&sl=ja&tl=en&u=http%3A%2F%2Fegami.blog.so-net.ne.jp%2F2011-04-08">EG</a>] & Â have posted a patent for a new Sigma 500 f/4 supertelephoto lens.</p>
<p>With the price of the new Canon offerings, there’s going to be lots of room for other companies to make big glass more affordable.</p>
<p><strong>Patent Information:</strong></p>
<ul>
<li>Patent: 2011-70043</li>
<li>Patent filing date: Sept 28, 2009</li>
<li>Focal length: 489.9938</li>
<li>Aperture: 4.1004</li>
<li>Angle of view: 5.0498 °</li>
<li>Back Focus 90.3449mm</li>
</ul>
<p><strong><span style="color: #ff0000;">c</span>r</strong>