Cinematography

The fact that Nolan himself had not been nominated for Best Director was considered by many film fans to have been one of the nomination roster's major oversights.

But Visual Effects was the fourth win of the night for "Inception": It earlier took home Best Sound Mixing, Best Sound Editing, and Best Cinematography

Source: http://news.cnet.com/8301-13577_3-20037044-36.html