The imaging side of the D700 is pretty much the same as the D3; it shares the acclaimed 12.1MP full frame ('FX') sensor and has the same processing engine, so we would presume output to be almost identical. The main differences (aside from being considerably smaller) are physical; there's a different shutter (good for 150,000 exposures rather than 300,000 on the D3), different viewfinder prism (with 95% coverage) and a slower burst rate. You also lose the rear LCD info panel (there's no room for it) and one of the D3's two CF card slots, but you do get a couple of extra features to soften the blow slightly; most notably a self-cleaning sensor and a built-in flash.
Please note all prices are exclusive of VAT (20% will be added to the final price).
12.1 megapixel full-frame sensor (8.45µm pixel pitch)
Image Sensor Cleaning (vibration)
*ISO 200 - 6400 (with boost up to ISO 25600 and down to ISO 100)
Also supports DX lenses, viewfinder automatically masks (5.1 megapixels with DX lens)
14-bit A/D conversion, 12 channel readoutSame ultra-fast startup and shutter lag as D3 Nikon
EXPEED image processor (Capture NX processing and NR algorithms, lower power)
New Kevlar / carbon fibre composite shutter with 150,000 exposure durability
*Multi-CAM3500FX Auto Focus sensor (51-point, 15 cross-type, more vertical coverage)Auto-focus tracking by color (using information from 1005-pixel AE sensor)95% coverage,0.72x magnification viewfinder
*Auto-focus calibration (fine-tuning), fixed body or up to 20 separate lens settingsScene Recognition System (uses AE sensor, AF sensor)Picture Control image parameter presets5 frames per second continuous with auto-focus tracking
*Optional MB-D10 Battery Pack (same as D300), increases burst rate to 8 fps
*UDMA compatible single CF card slot
*3.0" 922,000 pixel LCD monitorLive View with either phase detect (mirror up/down) or contrast detect Auto FocusVirtual horizon indicates if camera is level (like an aircraft cockpit display)HDMI HD video output'Active D-Lighting' (adjusts metering as well as applying D-Lighting curve)Detailed 'Control Panel' type display on LCD monitor, changes color in darknessMagnesium alloy body with connections and buttons sealed against moistureImproved Info display on main screen*