Re: 18 incher

#3261

Brendan Martin
Administrator
1p

Hi Julie, there are lots of pro’s and con’s to making your own mirror, making a smaller mirror first would help, doing a large mirror at such a short focal length did pose many problems not least testing the figure. There are many books available on mirror making but one of the best is “The Dobsonian Telescope” by Richard Berry and David Kriege.
cheers
Brendan