Archived posting to the Leica Users Group, 1999/08/31
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> > So, my question is: What is the scientific justification for this "rule of > thirds"? Empirically it doesn't seem to exist. > > Some of these rules are useful approximations which work over a certain range of values, but break down outside this range. Take the 'rule' which states 'double the focal length and you will get half the angle of view'. This rule works fine for longer focal lengths but breaks down for short ones. A 2mm theoretical lens for example will cover just under 180 degrees, but a 1mm lens won't cover 360 degrees.