Giovanni Battista della Porta (contd.)
This work was a popular piece of scientific literature in the
sixteenth century in which Porta gives a thorough description
of a camera obscura and the images that one would see. From
about this point on, the camera obscura would become a
useful tool to artists.
In the second edition of his popular title, which was published
in 1588, Porta includes a lens for the camera instead of a
pinhole. This improved definition and allowed an image to be
sharply focused on a piece of ground glass, allowing the
operator to trace a picture on a sheet of paper laid over the