A few examples survive today. A second type was in the form of a portable tent. A lens and mirror at the apex of the tent produced an image on a horizontal desk inside the tent. The third form was the portable box-form camera obscura which produced an image on translucent paper. It was this this type of camera obscura that eventually lead to the development of the photographic camera when it was used by the inventors of photography, Wedgwood, Niepce, Daguerre and Talbot.
Camera obscuras working today.