Bernd Stiegler started a blog on 'Photographic Realism' and he devoted one of his posts to the 'Imperfection'.
"In looking at both contemporary exhibitions as well as photographs as they are used in everyday aesthetic applications, one notices that imperfection plays a key role. Far removed from the ideals of the Group f/64, New Objectivity, or even the Bechers and their school, to name a few positions, photographs that consciously employ technical errors have become common sense in photography. There are photographers who use deficient cameras;..."
"Imperfection is the new ideal of contemporary photography, even if celebrated, staged, and represented in a kind of perfection. My thesis is that imperfection serves as the contemporary modus of the real in photography. For this very reason photography has become enamored of and committed to inaccuracy, because it enables a form of representation that aims to conceptualize reality in a unique aesthetic manner."
Read the rest of the post here and don't miss to read the huge correspondence in the comments