If you know Italian or can survive the word salad created by Google Translate, Macro Cavina has an incredible article going through the history of symmetrical wide angle lenses beginning with the Hypergon. It's not all LF, but beyond his Hypergon discussion, he also covers a variety of LF Zeiss Hologon prototypes, and the famed Zeiss 75mm f/4.5 Biogon.
It's worth a read...again with the language caveats in place:
http://www.marcocavina.com/articoli_...gon/00_pag.htm
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