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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク John Wall (inventor) ： ウィキペディア英語版 John Wall (inventor) John Wall (born 1932 in Crayford, England) is a British design engineer, amateur astronomer, amateur telescope maker and member of the British Astronomical Association, now living Coventry England. ==Biography== John Wall's aptitude for engineering won him an apprenticeship with Vickers Armstrong at the age of sixteen in the town of Crayford where he was born. He served in the army with the Royal Electrical and Mechanical Engineers in early 1950s and there became interested in telescopes and astronomy. He went on to became a design engineer at Vickers and, while working there in 1969, came up with the idea for an accurate mechanically simple eyepiece mount for amateur telescopes, the Crayford focuser. He is also known for designing dialyte based refracting telescopes, coming up with the ''Zerochromat'' retrofocally corrected refractor, including a folded 30-inch f/12 version he built in 1999. 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「John Wall (inventor)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.