[At the University of Vienna] he studied in detail L M Daguerre's invention, the so-called daguerreotype, and took on shortening its exposure time from minutes to seconds.
[Sa University of Vienna]-aral siya sa mga detalye lm Daguerre's imbento, ang tinatawag na daguerreotype, at kinuha sa mantika nito exposure oras mula sa mga minuto na seconds.