Furkel worked as his technical director until 1912 , along with another Dutch cameraman , Martin Knoop .
Greenbaum acquired a camera in Amsterdam , and a cameraman , Georg Furkel .
Georg Furkel worked as Greenbaum 's technical director until 1912 , along with another Dutch cameraman , Martin Knoop .
Greenbaum acquired a camera in Amsterdam , and a cameraman , Georg Furkel .