D3:
- FX format (Full frame) 12 Mpx CMOS made by Nikon
- 9 fps [FX format], 11 fps in DX crop mode [5.33 Mpx]
- ISO 200 - 6400 with LO (ISO 100 equiv.), H1 and H2 (ISO 12800/25600 equiv.)
D300:
- DX format 12 Mpx CMOS
- 6 fps and boost to 8 fps with power grip (no "cropped" mode)
- ISO 200 - 3200 with LO (ISO 100 equiv.), H1 (ISO 6400 equiv.)
D3 and D300 share the same AF system. 51 AF points. 15 of them are cross sensor. Supports live view mode. Will switch to contrast based AF in live view mode.
Five new lenses.
- AF-S 14-24/2.8 G
- AF-S 24-70/2.8 G
- AF-S VR 400/2.8 G
- AF-S VR 500/4 G
- AF-S VR 600/4 G