As a D7000 owner, my equipment is classified under mid-range. Still, the D7000 was intended to be a landmark camera and yet, despite having the essentials of a $5000 body, it still lacks a few other important features such as a real time histogram and live DOF preview. I've always been curious as to why Nikon leaves out such critical features in its mid-range cameras, forcing you to instead drop more than $4000 for the privilege with its D3/D4 line. Canon users, on the other hand, get it for free. They probably already have it available on its latest entry-level Rebel line. So, what's Nikon's reasoning for reserving the above capabilities for its pro camera bodies?