[sybren]

Originally Posted by chauncey

I can't explain your difficulity sybren as clicking on your copy of my link took me to "Optical Terminology" with 216 pages.

I can. The link leads me to a 25-page PDF. However, it starts with a page numbered 192 and page number 210 is on the 19th page of the PDF. It's about page numbers and page numbers ;-)

It starts here EF Lens Work III: The Eyes of EOS by Canon Review

I'll keep that link, looks interesting