http://www.lpwalliance.com/publication/15/

Painting with light as a process was born together with photography. More precisely – photography was originally images drawn by sunlight!
The very name of the first imprinted images attests to this – they were called “heliography” that is literally “painted the sun.” The author of these heliographs was Joseph Nicéphore Niépce (France), and the first heliograph in the world was made on a plate of lead with pewter fusion in 1826. The exposure time was several hours, because the sensitivity of this method was initially very low and strongly dependent on the intensity of the light source, which at that time could only be the sun.

Today we call this technique “long exposure shooting” and we have many fine examples of modern photography made this way. As we know, in such cases all changeable and movable features become blurred as opposed to solid features which remain sharp. Look at the daguerreotype of James Valentine «The Falls of Clyde, Bonnington Falls», which was taken in 1871

(continua) http://www.lpwalliance.com/publication/15/