Brunelleschi, looking through a hole at a street in florence, makes a depiction of it from a fixed viewpoint.... The photographic process is simply the invention in the 19th century of a chemical substance that could ‘freeze’ the image projected from the hole in the wall, as it were, onto a surface. It was the invention of the chemicals that was new, not the particular way of seeing.... So the photograph is, in a sense, the end of something old, not the beginning of something new.

That's the Way I See It by David Hockney, Nikos Stangos (Editor)

ISBN: 0811814874 This book is available from Amazon