The Nikon D3100 D-SLR was recognized as a CES Innovations Design and Engineering Awards honoree.
Named as one of the Oprah's Favorite Things of 2010.
Both 18-55mm and 55-200mm NIKKOR VR Lenses included.

The Nikon D3100 Digital SLR Camera is an affordable, compact, and lightweight photographic power-house. It features the all-purpose 18-55mm VR lens, a high-resolution 14.2 MP CMOS sensor along with a feature set that's comprehensive yet easy to navigate - the intuitive onboard learn-as-you grow guide mode allows the photographer to understand what the 3100 can do quickly and easily. Capture beautiful pictures and amazing Full HD 1080p movies with sound and full-time autofocus. Easily capture the action other cameras miss with a fast start up time, split-second shutter release, 3 frames per second shooting and 11-point autofocus. Capture pictures and make movies in near darkness with an ISO range of 100 to 3200 (expandable to 12800-Hi2).

Features:

• 14.2 Megapixel DX-format CMOS Image Sensor: Delivers beautiful photographs and prints well larger than 20 x 30"
• 3x 18-55mm /3.5-5.6G and 3.6x 55-200mm f/4-5.6G Zoom-NIKKOR VR Lenses: With legendary NIKKOR optical quality and fast, accurate autofocus for vivid color, striking contrast and crisp detail and VR image stabilization to ensure the sharpest hand-held pictures and movies.
• D-Movie - Breathtaking full HD 1080p movies with Sound and Full-time Autofocus:Discover the difference a digital SLR makes when shooting movies. A wide selection of NIKKOR lenses gives you freedom to explore different angles and obtain lovely defocused backgrounds while D3100's advanced imaging system assures outstanding quality. And for action sequences, new Subject-tracking AF keeps subjects properly focused. After the shoot, view movies on the large 3" LCD monitor and perform simple editing tasks like trimming scenes before or after a designated point and extracting still images. Via the HDMI mini-pin connector, connect D3100 to an HDTV with playback managed by the TV's remote control.
• Compact and Lightweight Design: Beautifully styled-Ready to go wherever life takes you.
• Help Function - One-touch Access to In-camera Assistance: When viewing menu items and you don't understand a function, just press the help button. A description of the currently selected item will be displayed while the button is pressed. Release the button and the previous screen appears. A truly handy function that makes it easy for even first-time D-SLR users to operate D3100.
• Easy-To-Use Guide Mode: An enchanting portrait against a softly defocused background, or a radiant couple surrounded by sparkling lights. Taking photos like these is easy with D3100's Guide Mode - in-camera guidance that shows you step-by-step how to change camera settings. Just select a Guide Mode setting that matches the scene then let Guide Mode assist. Not only will you obtain the desired results, you'll understand how you achieved them. Guide Mode even displays sample photos so you'll know what to expect from each setting.
• 18 Guide Mode Shooting Options: Easy Operation: Auto, Close-ups, Landscapes, No flash, Sleeping faces, Portraits, Distant subjects, Moving subjects, Night portrait Advanced operation: Soften backgrounds, Freeze motion (people), Show water flowing, Bring more into focus, Freeze motion (vehicles) Use a timer/ quiet shutter: Single frame, Continuous, 10-second self-timer, Quiet shutter release
• Split-second Shutter Response: Eliminates the frustration of shutter delay, capturing moments that other cameras miss.
• Fast 11-point Autofocus System: D3100's precision high-speed autofocus responds immediately to changes in scene or composition, maintaining tack-sharp focus to capture fleeting expressions and fast-moving sports. The all-important central focus point features a cross-type sensor while the new superimposed display achieves a clear, uncluttered viewfinder. Various autofocus modes cover nearly any situation, including auto-area AF that automatically selects the subject on which to focus, and 3D-tracking (11 points) that maintains focus on a subject regardless of changes in composition as long as the shutter-release button is pressed halfway.
• Advanced White Balance Control: The Improved Scene Recognition system offers outstanding auto white balance performance that nearly rivals the precision of the D3s, Nikon's flagship camera. White is reproduced more faithfully while maintaining stable color balance regardless of light source.
• ISO Sensitivity 100-3200, Expandable to ISO 12800: Equivalent delivers exceptional results, even in the most challenging low-light situations.
• Large 3" Monitor: Live View with AF Modes: Live View gives you an intuitive, familiar way to photograph playful pets or children on the move. Just flip a switch and you're ready to go. When Live View is activated and new full-time-servo AF (AF-F) is selected, the camera keeps subjects in focus without having to press the shutter-release button - convenient for photos and movies. There is also new face-priority AF that locks focus on faces, even on people not directly facing the camera. Live View makes D3100 as easy to use as a compact camera.
• Easy-to-view Finder - New Superimposed Indicators for a Better View: During autofocus, D3100's superimposed indicators and BriteView Clear Matte Mark Ⅶ screen provide a cleaner, less cluttered view from corner to corner.
• Rangefinder - Quick and Easy Focusing: When focusing manually, the electronic rangefinder helps you quickly achieve proper focus. It is especially useful when shooting in dimly lit settings.

Technical Details:

• Camera Type:  Single-lens reflex digital camera

Imaging

• Resolution:  Total: 14.8 Megapixels, Effective: 14.2 Megapixels
• Sensor : 3.1 x 15.4mm Nikon DX-format CMOS sensor
• File Formats: NEF (RAW), JPEG: JPEG-Baseline compliant with fine (approx. 1:4), normal (approx. 1:8), or basic (approx. 1:16) compression, NEF (RAW) + JPEG: Single photograph recorded in both NEF (RAW) and JPEG formats
• File Size:  4608 x 3072 (L), 3456 x 2304 (M), 2304 x 1536 (S)
• Creative Color Modes:  Standard, Neutral, Vivid, Monochrome
• Movie Modes:
  • Yes HD 1080P (24fps; recording duration 10 minutes)
  • HD 720P (30, 25, 24fps user selectable; recording duration 10 minutes)
  • VGA/SD equivalent (30fps; recording duration 10 minutes)
  • QVGA equivalent (30fps; recording duration 10 minutes )
• Image Stabilization:  Depends on lens
• Crop Factor :  1.5x

Optics

• Lens:  AF-S DX NIKKOR 18-55mm f/3.5-5.6 VR
• Zoom: 18-55mm: 3x
• Lens Mount:
  • Nikon F-bayonet
  • AF-S and AF-I lenses: All functions supported
  • Type G or D AF NIKKOR without built-in autofocus motor: All functions except autofocus supported.
  • IX NIKKOR lenses not supported
• Focus Type:
  • Nikon Multi-CAM 1000 autofocus sensor module with TTL phase detection
  • 11 focus points (including one cross-type sensor), and AF-assist illuminator (range approx. 1' 8" to 9' 10")
  • Autofocus (AF): Single-servo AF (AF-S); full-time-servo AF (AF-F), Manual focus (MF)
  • AF-area mode: Face-priority AF, wide-area AF, normal-area AF, subject-tracking AF
• Focus Range: 18-55mm: 11" (0.28m) to infinity
• Accessory Lens/Filter Mount: 18-55mm: 52mm

Shooting Controls

• Sensitivity:  ISO 100 to 3200 in steps of 1 EV; Can also be set to approx. 1 EV above ISO 3200 (ISO 6400 equivalent) or to approx. 2 EV above ISO 3200 (ISO 12800 equivalent); auto ISO sensitivity control available
• Shutter Speeds: Electronically controlled vertical-travel focal-plane shutter
• 1/4000 to 30 s in steps of 1/3 EV, Bulb
• Metering:
  • Matrix: 3D color matrix metering II (type G and D lenses); color matrix metering II (other CPU lenses)
  • Center-weighted: Weight of 75% given to 8-mm circle in center of frame
  • Spot: Meters 3.5-mm circle (about 2.5% of frame) centered on selected focus point
• Exposure Modes: Auto modes (auto, auto [flash off ]); Scene Modes (Portrait; Landscape; Child; Sports; Close up; Night portrait); programmed auto with flexible program (P); shutter-priority auto (S); aperture-priority auto (A); manual (M), -5 to +5 EV in increments of 1/3 EV, Luminosity locked at detected value with AE-L/AF-L button
• White Balance:  Auto, incandescent, fluorescent (7 types), direct sunlight, flash, cloudy, shade, preset manual(up to 5 values can be stored), Fine tune by Kelvin color temperature setting (2,500 K to 10,000K)
• Burst Capability: Up to 3 frames per second
• Self Timer: 2 sec, 10 sec
• Remote Control: MC-DC2 (available separately), GPS unit: GP-1 (available separately)

Flash

• Built-in Flash: Built-in pop up, auto, auto with red-eye reduction, fill-flash, auto slow sync, auto slow sync with red-eye correction, and rear curtain with slow sync
• Effective Flash Range: Guide number: Approx. 39' (12m), 43' (13m) with manual flash (ISO 100), -3 to +1 EV in increments of 1/3 EV
• External Flash Connection: Hotshoe with sync and data contacts and safety lock
• Dedicated Flash System:
  • TTL: i-TTL balanced fill-flash and standard i-TTL flash for digital SLR using 420-pixel RGB sensor are available with built-in flash and SB-900, SB-800, SB-600, or SB-400 (i-TTL balanced fill-flash is available when matrixor center-weighted metering is selected)
  • Auto aperture: Available with SB-900/SB-800 and CPU lens •
  • Non-TTL auto: Supported flash units include SB-900, SB-800, SB-80DX, SB-28DX, SB-28, SB-27, and SB-22S
  • Distance-priority manual: Available with SB-900 and SB-800
  • Advanced Wireless Lighting supported with SB-900, SB-800, or SU-800 as commander; Flash Color Information Communication supported with built-in flash and all CLS-compatible flash units
• Max Sync Speed     1/200

Memory

• Built-in Memory: None
• Memory Card Type: SD, SDHC, & SDXC compliant

A/V Recording

• Recording Formats: MOV, H.264/MPEG-4 Advanced Video Coding
• Video Recording
• Video Resolution:
  • 1920 x 1080 (24p): 24fps (23.976fps)
  • 1280 x 720 (30p): 30fps (29.97fps)
  • 1280 x 720 (25p): 25fps
  • 1280 x 720 (24p): 24fps (23.976fps)
  • 640 x 424 (24p): 24fps (23.976fps)
• Video Clip Length: 10 minutes
• Audio Recording: Linear PCM

Viewfinder/Display

• Viewfinder Type:
  • Eye-level pentamirror single-lens reflex viewfinder
  • Diopter adjustment: 1.7 to +0.5 m-1
  • Eyepoint: 18mm (-1.0 m-1)
  • Magnification: Approx. 0.8 x (50mm f/1.4 lens at infinity, -1.0 m-1)
  • Focusing screen: Type B BriteView Clear Matte Mark VII screen
• Viewfinder Coverage:  Approx. 95% horizontal and 95% vertical
• Display: 3", Approx. 230k-dot TFT LCD with brightness adjustment

• Multi-Channel Playback

Connectivity/System Requirements

• Connectivity: USB - Hi-speed USB, Type C mini-pin HDMI connector, NTSC, PAL

Environmental

• Operating/Storage Temperature: 32 to 104°F (0 to 40°C)

Power

• Battery Type: EN-EL14 rechargeable Li-ion battery (included)
• Power Adapter: EH-5a AC adapter (sold separately); requires EP-5A power connector (sold separately)

Physical

• Dimensions: 4.9 x 3.8 x 3" (124.46 x 96.52 x 76.2mm) camera
• 2.9 x 3.1" (73.66 x 78.74mm) 18-55mm Lens
• Weight: 1 lbs (453g) Body without battery, memory card, or body cap
• 9.3 oz (263.65g) 18-55mm Lens

Source:
http://nikonusa.com