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<info>
<title>Infrared</title>
<volumenum>8</volumenum>
<issuenum>72</issuenum>
<pubdate>2005-05-06T07:21:35-04:00</pubdate>
<date>$Date$</date>
<author><personname>
<firstname>Norman</firstname><surname>Walsh</surname>
</personname></author>
<copyright><year>2005</year><holder>Norman Walsh</holder></copyright>
<abstract>
<para>The infrared filter is almost opaque to my eyes, but not
to my Nikon's CCD.</para>
</abstract>
<dc:coverage rdf:resource="http://norman.walsh.name/knows/where/us-ma-belchertown"/>
</info>

<epigraph>
<attribution><personname>
<surname>Swift</surname>
</personname></attribution>
<para xml:id='p2'>Vision is the art of seeing things invisible.</para>
</epigraph>

<para xml:id='p1'>A quick experiment with the TV remote control
demonstrated that my camera could see infrared.<footnote>
<para xml:id='p3'>Take your camera to a dark room, point the remote at
the lens, push the shutter and some button on the remote at about the
same time. If you get a picture of the LED in the remote glowing
brightly, your camera can see IR. If it's pitch black, it probably
can't.</para></footnote> Then I had to visit <link
xlink:href="http://www.ebay.com/">eBay</link>.</para>

<mediaobject role="flickr">
  <imageobject xlink:href="http://www.flickr.com/photos/ndw/12540774/">
    <imagedata fileref="http://photos8.flickr.com/12540774_e7194c1b6d.jpg"/>
  </imageobject>
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<para xml:id='p4'>For comparison, here's the same scene in all of its
visible spectrum resplendence:</para>

<mediaobject role="flickr">
  <imageobject xlink:href="http://www.flickr.com/photos/ndw/12540944/">
    <imagedata fileref="http://photos8.flickr.com/12540944_e2661e2006.jpg"/>
  </imageobject>
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<para xml:id='p5'>Neither image has much artistic merit, but I do like
the ethereal quality that IR lends to the trees. I think this filter
is a keeper.</para>

</essay>
