Best classical reference (yet somewhat more modern than Newton) is: How to make a telescope by Jean Texereau http://archive.org/details/HowToMakeATelescope ht

Best classical reference (yet somewhat more modern than Newton) is: How to make a telescope by Jean Texereau http://archive.org/details/HowToMakeATelescope http://archive.org/details/HowToMakeATelescope