On 9/02/2013 8:55 p.m., RichA wrote:

The interesting comparison (IMO) is between the D600 and D5200. It's
not often that you have a comparison between the same "generation" of
sensor and same megapixel count, but one Fx and the other Dx.
With different "generation" sensors or between brands, there's usually
enough difference in contrast, colour rendering, default sharpening, NR
etc, so that it's hard to see what's going on.
To my eyes, the D5200 studio shots (raw) look almost exactly as they
should - ie at ISO 800, they are almost as good as the D600 at ISO 1600,
but clearly much better then the D600 at ISO3200.
The 24mp APS-c studio shots are (when adjusted to allow for the "one
(and a bit)" stop advantage of FX, practically indistinguishable in
every way - including detail at base ISO.
In the field it might be a different story.