hassighedgehog wrote:
http://www.johnhpanos.com/epcalib.htm calls the point the "entrance pupil" and explains how to find it. He says the term "nodal point" is incorrect and explains why. It is not the nodal point in the light path (a geometric term), which is in the middle of the lens. I believe the use of the term "nodal point" causes the confusion in locating it
This YouTube video will help you find "the Point" quickly and easily without a lot of measuring and calculating.