The D4 (and its predecessors) is built like a tank and impervious to bumps, jolts, knocks, bangs, and short drops. The f/2.8 zooms and the longer handholdable telephotos are well balanced with the heavy body. That said, heavy lenses on a heavy body make for some arm stress — though I regularly use the D3s with the 70-200 f/2.8 handheld for several hours at a time.
With the D4 you get: • The fastest and most accurate AF that Nikon has to offer • The best frame rate Nikon has to offer • The best high ISO performance
This is THE sports-wildlife-photojournalism body out there.
Jon Kandel A New York City Nikonian and Team Member Please visit my website and critique the images!