<P> The use of a lens in the opening of a wall or closed window shutter of a darkened room to project images used as a drawing aid has been traced back to circa 1550 . Since the late 17th century portable camera obscura devices in tents and boxes were used as a drawing aid . </P>
<P> The use of a lens in the opening of a wall or closed window shutter of a darkened room to project images used as a drawing aid has been traced back to circa 1550 . Since the late 17th century portable camera obscura devices in tents and boxes were used as a drawing aid . </P>
when was the world 's first camera invented
when was the world 's first camera invented
circa 1550
circa 1550