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    <title>Without Lenses: Comments by Earl Johnson</title>
    <link>http://www.withoutlenses.com/person/10132</link>
    <pubDate>Sun, 12 Aug 2007 19:59:56 GMT</pubDate>
    <description>Comments by Earl Johnson</description>
    <item>
      <description>&lt;p&gt;I hope that Tom Persinger is remembered as one of the facilitators of the post-factory photographic revolution of the early 21st century. My life is much richer as a result of my participation in f295. I have made friends that I will cherish for the rest of my life.&lt;/p&gt;

	&lt;p&gt;Thank you, Tom&lt;/p&gt;</description>
      <link>http://www.withoutlenses.com/view/spreading-the#content_11148</link>
      <guid>http://www.withoutlenses.com/view/spreading-the#content_11148</guid>
      <pubDate>Sun, 12 Aug 2007 19:59:56 GMT</pubDate>
      <author>Earl Johnson</author>
    </item>
    <item>
      <description>&lt;p&gt;Here&amp;#8217;s a link to an article on making a pinhole:&lt;br /&gt;&lt;a href="http://unblinkingeye.com/Articles/Pinhole/pinhole.html" rel="nofollow"&gt;http://unblinkingeye.com/Articles/Pinhole/pinhole.html&lt;/a&gt;&lt;/p&gt;</description>
      <link>http://www.withoutlenses.com/view/how-to-build-a-4x5#content_11716</link>
      <guid>http://www.withoutlenses.com/view/how-to-build-a-4x5#content_11716</guid>
      <pubDate>Fri, 24 Aug 2007 20:14:58 GMT</pubDate>
      <author>Earl Johnson</author>
    </item>
    <item>
      <description>&lt;p&gt;Olympus digital camera.&lt;/p&gt;</description>
      <link>http://www.withoutlenses.com/view/how-to-build-a-4x5#content_11994</link>
      <guid>http://www.withoutlenses.com/view/how-to-build-a-4x5#content_11994</guid>
      <pubDate>Tue, 04 Sep 2007 11:52:19 GMT</pubDate>
      <author>Earl Johnson</author>
    </item>
    <item>
      <description>&lt;p&gt;Andy &amp;#8211; I don&amp;#8217;t have a Polaroid back, but if I ever get one, I will make it work on my 4&amp;#215;5 cameras.&lt;/p&gt;

	&lt;p&gt;Kathia &amp;#8211; f stop is the distance from pinhole to film divided by the aperture diameter &amp;#8211; thus my 120 mm 4&amp;#215;5 camera with a .4 mm pinhole is 120/.4 or f300. You can use a scanner to measure the diameter of your pinhole. There are also relatively inexpensive magnifiers with measuring reticles available &amp;#8211; check out the Peak Optics website.&lt;/p&gt;</description>
      <link>http://www.withoutlenses.com/view/how-to-build-a-4x5#content_15115</link>
      <guid>http://www.withoutlenses.com/view/how-to-build-a-4x5#content_15115</guid>
      <pubDate>Mon, 28 Jan 2008 16:22:38 GMT</pubDate>
      <author>Earl Johnson</author>
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