This is an excellent lecture delivered by Stephen Shore at the Photographer’s Gallery in London. The sound unfortunately is not great but i do think it is very much a must to watch. Here is the link: Stephen Shore, Photography and the Limits of Representation, 13.10.2010

“So because there are these four transformative factors, we have four different tools of selection. And they are focus, the moment we take the picture and the duration that the exposure lasts, the choice of the frame, and the choice of vantage point. And they define the image. (…) A photographer combines a perception, a perception of the world, a perception of photography, of art, a perception about perception, about themselves. A photographer combines a perception with an understanding of these transformations.” (Stephen Shore, in Photography and the Limits of Representation, 2010)