<h3>PerspectiveCamera( fov <ahref="../core/Number.html">Number</a>, aspect <ahref="../core/Number.html">Number</a>, near <ahref="../core/Number.html">Number</a>, far <ahref="../core/Number.html">Number</a> )</h3>
Uses focal length (in mm) to estimate and set FOV 35mm (fullframe) camera is used if frame size is not specified.<br/>
Formula based on <ahref="http://www.bobatkins.com/photography/technical/field_of_view.html"target="_blank">http://www.bobatkins.com/photography/technical/field_of_view.html</a>