The nikon D4 is for full time professionl news, sports and photographers.You guys know who you are.The D4 belts out the shots like nothing els if you`re a pro, butif you don`t know what you`r doing all you`ll get are ten off colour , fuzzy and mal-exposed shots pre second just like any other camera.The D4 works great in low light and at high ISO. Nikon ditched most of the external autofocus mode controls in favour of putting video controls there, but the great news is that D4 autofocus system is so clairvoyant that you rarely need the controls anyway.D4 run for thousand of shots on a charge.