That is a great link Suzy, I also like this .gif from the Explore Scientific site
http://www.explorescientific.com/ima...ieces_afov.gif
http://www.explorescientific.com/eye...ee_series.html
After looking through an 82 degree eyepiece, I'd never want to look through a 50 degree plossl again, except maybe for planets.
I can't imagine a 100 degree AFOV, I think I'd be worried about falling in...