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Topogon
Topogon is a wide field (originally 100 degrees field of view), symmetrical photographic lens designed by Robert Richter in 1934 for Zeiss Carl FA.〔http://ip.com/patent/US2031792〕 Lenses produced under the name Metrogon also cite the US patent of the Topogon design. Topogon lenses have been produced in f numbers ranging from f/3.5 to f/15 in various focal lengths.〔http://www.marcocavina.com/articoli_fotografici/Hypergon_Topogon_Biogon_Hologon/00_pag.htm〕 == External links ==
*(HYPERGON - TOPOGON - RUSSAR - BIOGON - AVIOGON - HOLOGON: LA STORIA DEFINITIVA DEI SUPER-GRANDANGOLARI SIMMETRICI )
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Topogon」の詳細全文を読む
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