Talk:Franz Staeble
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Über eine genäherte Bestimmung der Brennweiten aus den focalen Schnittweiten und aus der Luft reduzierten Länge des Systems (1906).
F. STAEBLE, Bestimmung der Brennpunkte und Hauptpunkte aus den Anfangsund Endwerten usw. axialer ... F. STAEBLE, Über eine Differenzenformel zur Sinus- und Isoplanasiebedingung mit Bemerkungen zur Seidelschen Theorie. --Heritagefutures (talk) 03:03, 10 December 2012 (PST)
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Married to 'Lisi' Staeble (Pohlmann, Ulrich (1995) Frank Eugene, the dream of beauty. Nazraeli Press. p 146) --Heritagefutures (talk) 03:03, 10 December 2012 (PST)
Chase up leads
In 1930 Staeble sold the Imagon design to Rodenstock. It is asserted this was necessary because Staeble ran into financial difficulties following the 1929 stock market crash and could not produce the lens as required.[1]
what else was caused by the 1929 crash? did Staeble all of his works?--Heritagefutures (talk) 09:47, 10 December 2012 (PST)
