Archived posting to the Leica Users Group, 2001/07/31
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Ext-Peter.Sikking@nokia.com wrote: > > --> This book is my first introduction to lens > --> aberrations, and because of the shaky physics > --> I do not have the feeling I can trust him on > --> this subject. > > --What specific errors in physics did you encounter in the book? > > I said shaky (as in out of his depth), not wrong. > > One example that really sticks in my mind is where he introduces > a definition of a flux (= net flow of something through a _surface_) > to jump to this apparent law that for a given focal length, the > _volume_ of the tube devided by the square of the max aperiture is > constant. That law may be true, but I am not convinced, yet. > > --ps/032 Done much study of optics and lens design? Mark Rabiner Portland, Oregon USA http://www.rabiner.cncoffice.com/