<?xml version="1.0" encoding='utf-8'?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card id="card1" title="Focal length - Page 20 - Wikipedia">
<p>
<a accesskey="1" href="page.php?w=focal_length&amp;p=19">1.Previous</a><br />
<a accesskey="3" href="page.php?w=focal_length&amp;p=21">3.Next</a>
</p>
<p>distant objects the same size as the lens in question.  For <a href="page.php?w=rectilinear_lens">rectilinear lens</a>es (that is, with no <a href="page.php?w=image_distortion">image distortion</a>), the imaging of distant objects is well modelled as a <a href="page.php?w=pinhole_camera_model">pinhole camera model</a>.  This model leads to the simple geometric model that photographers use for computing the <a href="page.php?w=angle_of_view">angle of view</a> of a camera; in this case, the angle of view depends only on the ratio of focal length</p><p>
<a accesskey="1" href="page.php?w=focal_length&amp;p=19">1.Previous</a><br />
<a accesskey="3" href="page.php?w=focal_length&amp;p=21">3.Next</a>
</p>

<do type="prev" label="Search">
        <go href="search.wml"/>
</do>

</card>
</wml>
