Tue 28-Aug-12 01:58 AM | edited Tue 28-Aug-12 02:04 AM by KnightPhoto
Not knocking the D3/D700, D3S, or D800/E in any way - all great in low light. In fact I just processed some D700 birds that were super.
But for reach I have been using a D7000 for almost two years now as Nikon's best DX sensor (at least until the D3200 I could say that). The D7K sensor goes very well until ISO 1000 for birding. Beyond ISO 1600 you need Nikon's 12mp, 16mp, or 36mp full frame sensors.
And if an announcement is immanent for the D600 or D400 then you will have even more options...