I seem to have lost track of a particular web site/page which included cross-sectional diagrams of many different eyepiece designs, and I'm wondering if it might ring a bell with anyone -- perhaps you can point me in the right direction. Here are some of the clues I recall...
Firstly, the page/site I have in mind is *not* P. J. Smith's, as found here:
The page I'm remembering included multi-colored schematics of more than a dozen designs (vertically oriented, I believe, and against a white background). If memory serves, some of the designs represented were: the usual suspects (Huygens, Ramsden, Kellner), Abbe's orthoscopic, perhaps multiple Konig designs, Erfle variants, maybe a couple of Naglers, and (I think) one or more Bertele(s). Others may have been the Brandon and the Plossl (ala Clave). Another aspect I'm sure of is the presence of several other exotic & little-known wide-angle eyepieces which referenced their designers' surnames.
I wish I could recall one or more of those surnames -- that info alone would likely do the trick.
Hints, nudges, bread crumbs, or wink-wink clues are welcome. Heck, I could probably make do with the URL
Best wishes and many thanks.