Tessar: 4 elements in 3 groups
http://en.wikipedia.org/wiki/Tessar
Dialyte: 4 air spaced elements
http://en.wikipedia.org/wiki/Dialyte_lens
Fujinon-C 300mm: 4 elements in four groups
http://fujifilm.jp/personal/filmandc...t/compact.html
http://translate.google.com/translat...2Fcompact.html
In any case, I found the article very useful and an interesting read!
Cheers,
Andreas
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