My wife and I each shoot with a D800 and a 24-120 f/4 as our go to lenses. It does about 80% of the work for us. It was worth the investment for us. We do not shoot sports or interiors in general to speak of. The f/4 has much more focal length range and less weight than lenses such as the 24-70 f/2.8. Most of our work is done at f/5.6 to f/16.