Who was the Hockney - Falco thesis named after ?
However , the historians were more sanguine about the possible relevance of the thesis between 1550 and the invention of the telescope , and cautiously supportive after that period , when there clearly was interest and capacity to project realistic images ; 17th century painters such as Johannes Vermeer and Gaspar van Wittel used optical devices in variety of ways , though not the ways postulated by Hockney .