here is a nice article, about the 35mm 1.4, it's in italian, but you can translate:
http://www.marcocavina.com/articoli_fotografici/Glatzel-1,4-35/00_pag.htm
http://www.marcocavina.com/articoli_fotografici/evoluzioni_Zeiss/00_pag.htm
what do you think of kiron kino precision f2.0 lenses?