About the technical details of the camera, their robustness, their sensor etc. was already written enough. I am talking about something else. Lately full-format cameras are heavily advertised and Photo magazines draw because with. Of course offer full-format cameras under certain conditions (extremely low-light conditions) more reserves. Some (in the 5000 class) are also more resistant. But how many photographers actually work under extreme conditions? The D7100, which I have not purchased through Amazon dissolves exceptionally, on excellent and good is the quality good lenses. The autofocus system is much better than the Nikon D 610. Also otherwise I go from nothing. There are films to more comfortable and more professional solutions, but I do not need the camera; but they can be quite good. I make my living partly with photography, so I'm a (semi?) Professional. For my photographic subjects I do not need full-format camera; the should change, so I'll spend a lot of money and get me a. A (full) professional once told me why he often a Hasselblad for customers drags: In order to impress him! In fact, he needed them rarely. In summary: For good photos (which makes the photographer, not the camera!) Reaches the D7100 all, who wants to specify (or she really needs) who'll get a D800 or D4. Incidentally, there is hardly an objective, which can exhaust the power of the D800. The few know buyer. Ever rather saved in the optics as in the cases, what nonsense! But some find indeed plastic lens on a full frame camera cool, because they have such beautiful blurred edges and vignetting ... tastes are just different, and that's probably a good thing. So my recommendation (for most serious photographers): Good DX camera and very good lenses!