Has anyone found a web page that describes how eccentric rings work and how to adjust them? I need something visual to help me get my mind around it.
Navy Rate Training Manual OM 3 & 2 (now reprinted by Dover Press as OPTICS AND OPTICAL INSTRUMENTS). You will also find some information in #5, #6, and # 7 of Amateur Telescope Making Journal--Now published in volume 1 of the Best of Amateur Telescope Making Journal, by Willmann-Bell publishing.
I used some drawings and photos. It is not all inclusive, but then I am saving that for the book. Also, I let my company take over the magazine, and I don't profit from sales of the books, except in that it does not hurt a freelancer to have his name on two, thick, well-respected books.
Hope this helps,