Key Features :
Newly designed Nikon DX-format CMOS image sensor with wide ISO sensitivity range with low noise
EXPEED for smooth tones, rich colors and fine details
Innovative D-SLR movie function: D-Movie
Scene Recognition System integrated with Face Detection System
Easy-to-use Live View mode
Picture Control System: Customize the visual style of your images
Active D-Lighting for smooth tone reproduction in high-contrast lighting
Versatile practical 11-point AF system
Bright pentaprism viewfinder featuring frame coverage of approx. 96%
Advanced Scene Modes for superior image quality
Extensive palette of in-camera Retouch Menus
Engineered for precision and durability

Specifications :
Type of Camera
Single-lens reflex digital camera

Effective Pixels
12.3 million

Image Sensor
Nikon DX format (23.6 x 15.8 mm) CMOS sensor

Image Size (Pixels)
4,288 x 2,848 [L], 3,216 x 2,136 [M], 2,144 x 1,424 [S]; D-movie: 1240 x 720 / 24fps, 640 x 424 / 24fps, 320 x 216 / 24fps

Sensitivity
ISO 200 to 3,200 in steps of 1/3 EV, plus HI-0.3, HI-0.5, HI-0.7, HI-1 (ISO 6400); sensitivity decreases approx. LO-0.3, LO-0.5, LO-0.7 and LO-1 (ISO 100)

File Format
NEF (12 bit compressed RAW); JPEG (Baseline-compliant); AVI (Motion JPEG compression format with monaural sound)

Storage Media

SD memory card (SDHC compliant)

Shooting Modes
1) Single frame shooting mode, 2) Continous low shooting mode, 3) Continous high shooting mode, 4) Self-timer mode, 5) Delay remote mode, 6) Quick-response remote mode 7) D-Movie

White Balance
Auto (TTL white-balance with 420-pixel RGB sensor), 12 manual modes with fine-tuning; color temperature setting; preset white balance; white balance bracketing

LCD Monitor
3.0", 920,000-dot low-temperature polysilicon TFT LCD, allows up to 170-degree wide viewing angle

Playback Function
1) Full frame,

2) Thumbnail (4, 9, 72 and calendar),

3) Magnifying playback,

4) movie playback,

5) Pictmotion,

6) Slide show,

7) Histogram indication,

8) Highlights point display,

9) Auto image rotation,

10) Image comment

Delete Function
1) Card format,

2) All frames delete,

3) Selected frames delete

Interface
USB 2.0 (High-speed): Mass Storage and MTP/PTP selectable, GP-1 (GPS Unit)

Picture Angle (in 35mm [135] format equivalent)
Approx. 1.5x lens focal length

Viewfinder
Fixed eye-level pentaprism; built-in diopter adjustment (-2 to +1 m-1)

Focusing Screen
Type B BriteView Clear Matte Mark II screen

Viewfinder Frame Coverage/Magnification (with 50mm lens at infinity; -1.0 m-1)
Approx. 96%/ Approx. 0.94x

Autofocus
TTL phase detection by Nikon Multi-CAM 1000 autofocus module with AF-assist (range approx. 0.5-3m/1ft 8 in. - 9ft 10 in.); Detection range: -1 to +19 EV (ISO 100 at (ISO 100 at 20°C/68°F)

Focus Modes
1) Autofocus (AF): Single-servo AF (AF-S); Continous-servo AF (AF-C); Auto AF-S/AF-C selection (AF-A), 2) Manual focus (M) can be selected from 11 focus area

Exposure Metering System
1) 3D-Color Matrix Metering II (type G and D lenses); Color Matrix Metering II (other CPU lenses) performed by 420-segment RGB sensor, 2) Center-weighted: Weight of 75% given to 6, 8 or 10mm circle in center of frame, 3) Spot: Meters 3.5mm circle (approx. 2% of frame) centered on active focus area

Exposure Metering Range (at normal temperature [68°F/20°C], ISO 100 equivalent, f/1.4 lens)
1) 0 to 20 EV (3D-Color Matrix or Center-weighted metering),

2) 2 to 20 EV (Spot metering)

Exposure Control
1) Digital Vari-Program (Auto, Auto [Flash Off], Portrait, Landscape, Sports, Close Up, Night Portrait),

2) Programmed Auto [P],

3) Shutter-Priority Auto [S],

4) Aperture Priority Auto [A],

5) Manual [M]

Auto Exposure Bracketing
2 to 3 exposures in increments of 1/3, 1/2, 2/3, 1 or 2 steps to (+-) 1.0 EV

Maximum Shutter
1/4000

Minimum Shutter
30

Shutter
Electronically controlled vertical-travel focal plane shutter, 30 to 1/4000sec in steps of 1/3 EV plus bulb

Sync Contact
X-contact only; flash synchronization at up to 1/200 sec

Flash Control
1)TTL flash control with 420-pixel RGB sensor; i-TTL balanced fill-flash and standard i-TTL fill flash available with SB-900, 800, 600 or 400,

2) Auto aperture available with SB-900, 800 and CPU lens

3) Non-TTL auto available with SB-900, 800, 28, 27 or 22s

4) Range-priority manual available with SB-900, 800.

Flash Sync Modes
1) Auto, 2) Fill-in flash, 3) Red-eye reduction, 4) Red-eye reduction with Slow sync, 5) Slow sync, 6) Rear-curtain sync, 7) Off

Self-Timer
Electronically controlled timer with duration of 2, 5, 10 or 20 s.

Depth of Field Preview Button
Yes

Remote Control
Via Wireless Remote Control ML-L3 (optional)
GPS
via GP-1 GPS Unit (optional)

Supported Languages
Total of 17 languages: Chinese (Simplified and Traditional), Danish, Dutch, English, Finnish, French, German, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish

Power Requirements
Rechargeable Li-ion Battery EN-EL3e, AC Adapter EH-5a (optional)

Battery Life (on a fully charged battery)
Approx 1,000 shots

Tripod Socket
1/4 in. (ISO1222)

Dimensions
Approx. 132 x 103 x 77mm

Weight (without battery, memory card or body cap)
Approx. 620g

Supplied Accessories (may differ by country or area)
Rechargeable Li-ion Battery EN-EL3e, Quick Charger MH-18a, USB Cable UC-E4, Video Cable EG-D2, Camera Strap AN-DC1, Body Cap BF-1A, Accessory Shoe Cover BS-1, LCD Monitor Cover BM-10, Software Suite CD-ROM

Other Features
Retouch menu, Info Display on LCD monitor, Intergrated Dust Reductions System, Live view (with face-priority AF), D-Movie

*Review:The Nikon D90 is a fantastic camera. It's Nikon's newest and best DX format DSLR. I prefer it to the old D300, which costs almost twice as much. That's the way it goes with digital cameras: new is almost always better, even for much less cost. The D90 has identical, or slightly better technical image quality than the D300, the exact same rear LCD, and adds several very useful ergonomic features for faster handling compared to the D300. These handling improvements will let you react faster to conditions, meaning you're more likely to get better pictures by being better prepared.
If you're considering a D300, forget it. Get the D90 instead.
The Nikon D90 is Nikon's newest and smartest DSLR. It has the same or better technical image quality as the D300 that costs much more, and it handles better and it makes movies, too!
The D90 is newer and better than the D300, for a fraction of the price, so long as you prefer the D90's lighter plastic body. Let's be honest: I've used my plastic D40 for years and it still works like new, so I don't see any reason to pay more for a D300's metal body unless you're shooting sports all day. All these cameras have metal lens mounts and are built to very high standards.