Title: Book does not meet my expectation
Product review: Having some background in Hamiltonian Mechanics I decided to buy the book to learn something about aberrations in optics. Till chapter 4 I found the book interesting. It defines the optical lenght and explain Fermat Principle, define caracteristic funcions and deduce vectorial ray equations. Chapter 3 explains how important properties can be deduced from symmetry. Chapter 4 introduces different types of aberrations considering the displacement from the ideal imaged point. In paragraph 23. defines the effective aberration coefficients and from there on the book loose all his clarity. It changes several times the notation and writeslong expresion of 12 or more terms with so many coeffiecients that is not posible to remember what are their meaning. I skiped paragraphs, pages and chapters but get the same stuff. So I enjoy only 1/5 of the book (which is better than nothing...) and get disppointed from the rest.
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