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A patent for a 300 f/4L IS II has been filed in Japan. Remember, patents don’t always become real products.</p>
<p><strong>Patent Publication No. 2011-27864</strong></p>
<ul>
<li>published 2011/02/10</li>
<li>filled 2009/07/23</li>
<li>Embodiment 1</li>
<li>focal distance f = 294.00mm</li>
<li>Fno = 4.14</li>
<li>angle of view 8.24 degrees</li>
<li>image circle 43.28mm</li>
<li>lens length 245.03mm</li>
<li>back focus 86.14mm</li>
</ul>
<p><strong>The Camera Shake:</strong></p>
<ul>
<li>The shake by a human is around 0.1-10Hz (low frequency).</li>
<li>The shake by a tripod is around 4-35Hz.</li>
<li>The shake by an in-vehicle camera is several Hz – around several hundred Hz (high frequency).</li>
<li>The conventional camera shake revision cannot revise a shake of the high frequency.</li>
<li>Because the shake revision revise a shake by mechanical movement.</li>
<li>The electro-optic effect supports movement of 100Hz or more kHz.</li>
</ul>
<p> </p>
<p><!--more--></p>
<div id="attachment_5947" class="wp-caption aligncenter" style="width: 578px"><img class="size-full wp-image-5947" title="2011_27864_fig02" src="http://www.canonrumors.com/wp-content/uploads/2011/02/2011_27864_fig02.png" alt="" width="568" height="234" /><p class="wp-caption-text">EF 300 f/4L IS II</p></div>
<div id="attachment_5948" class="wp-caption aligncenter" style="width: 410px"><img class="size-full wp-image-5948" title="ef300_4l_is_usm" src="http://www.canonrumors.com/wp-content/uploads/2011/02/ef300_4l_is_usm.png" alt="" width="400" height="270" /><p class="wp-caption-text">EF 300 f/4L IS (1997)</p></div>
<p><strong><span style="color: #ff0000;">c</span>r</strong>