I don't know if this has been posted before (I couldn't find it), but what exactly is the "full frame look" that FF users sometimes swoon about? Is it simply shallow DOF under conditions that would be difficult to achieve with a smaller sensor--i.e., greater distances from the camera? Does it only occur when using fast glass? In other words, if I'm shooting with a 50mm f/3.5 lens on a FF camera is it possible to produce photos with that "full frame look"? I know this is a very basic question, but I just realized I didn't know the answer.