The Nikon D5100 is a 16.2-megapixel DX-format DSLR F-mount camera announced by Nikon on April 5, 2011. It features the same 16.2-megapixel CMOS sensor as the D7000 with 14-bit resolution, while delivering Full HD 1080p video mode at either 24, 25 or 30fps. The D5100 is the first Nikon DSLR to offer 1080p video at a choice of frame rates; previous Nikon DSLRs that recorded 1080p only did so at 24 fps. It replaces the D5000 and is replaced by the D5200.
- Sony IMX071 16.2-megapixel Nikon DX format CMOS sensor.
- Nikon EXPEED 2 image/video processor.
- Automatic correction of lateral chromatic aberration for JPEGs. Correction-data is additionally stored in RAW-files and used by Nikon Capture NX, View NX and some other RAW tools.
- D-Movie mode with autofocus. (Up to 1080p at 24, 25 or 30, 720p at 25 or 30 frames per second.)
- Inbuilt time-lapse photography intervalometer
- Active D-Lighting.
- First Nikon DSLR with in camera High Dynamic Range mode (Built-in Camera HDR).
- 3.0-inch (76 mm) articulated 921,000-dot LCD.
- Live View shooting mode with Contrast Detect and face priority auto focus (activated with a dedicated button).
- Continuous Drive up to 4 frames per second.
- 3D Color Matrix Metering II with Scene Recognition System.
- 3D Tracking Multi-CAM 1000 autofocus sensor module with 11 AF points (One cross-type sensor in centre of frame).
- ISO sensitivity 100 to 6400 and up to 25600 with boost. With monochrome Night-vision up to ISO 102400 equivalent.
- Bracketing (exposure, Active D-Lighting and white-balance).
- Auto scene recognition mode with 19 pre-programmed scenes.
- Quiet shooting mode.
- Built-in sensor cleaning system (vibrating low-pass filter) and airflow control system.
- HDMI HD video output.
- Stereo microphone input (mono using built-in mic)
- Enhanced built-in RAW processing with extended Retouch menu for image processing without using a computer: D-Lighting, Red-eye reduction, Trimming, Monochrome & filter effects, Color balance, Image overlay, NEF (RAW) processing, Quick retouch, Straighten, Distortion control, Fisheye, Color outline, Color sketch, Perspective control, Miniature effect, Selective Color, Edit movie, Side-by-side comparison.
- File formats: JPEG, NEF (Nikon's RAW, 14-bit), H.264 video codec.
- EN-EL14 Lithium-ion Battery with up to 660 shots per charge (CIPA).
Like Nikon's other consumer level DSLRs, the D5100 has no in-body autofocus motor, and fully automatic autofocus requires one of the currently 162 lenses with an integrated autofocus motor. With any other lenses the camera's electronic rangefinder (which indicates if the subject inside the selected focus point is in focus or not) can be used to manually adjust focus.
The Nikon D5100 has available accessories such as:
- Nikon Stereo Microphone ME-1 
- Nikon ML-L3 Wireless (Infrared) and MC-DC2 wired remotes. Third party remotes are also available.
- Nikon GP-1 GPS Unit for direct GPS geotagging. Third party solutions partly with 3-axis compass, data-logger, bluetooth and support for indoor use are available from Solmeta, Dawn, Easytag, Foolography, Gisteq and Phottix. See comparisons/reviews.
- Battery grip third party solutions are available.
- Nikon CF-DC2 Soft Case.
- Third party solutions for WLAN transmitter are available.
- Various Nikon Speedlight or third party flash units including devices with Nikon Creative Lighting System wireless flash commander or support for SU-800 Wireless Speedlight Commander.
- Third party radio (wireless) flash control triggers are partly supporting i-TTL, but do not support the Nikon Creative Lighting System (CLS). See reviews.
- Tethered shooting with Nikon Camera Control Pro 2, Apple Aperture 3, Adobe LightRoom 3  or other partly free products including apps.
- Other accessories from Nikon and third parties, including protective cases and bags, eyepiece adapters and correction lenses, and underwater housings.
Nikon France used the D5100 for the production of the short film "Fragments". Nikon used the D5100 to film one of the television commercials for the camera itself, which feature actor and perennial Nikon pitchman Ashton Kutcher.
- "Digital-SLR camera Nikon D5100". Nikon Corporation. April 5, 2011. Retrieved 2011-04-05.
- "Nikon D5100". Nikon Corporation. Retrieved 2011-04-05.
- "DxOMark - Nikon D5100". DxOMark. Retrieved 2011-11-21.
- "Specifications – Nikon D5100". Nikon Corporation. Retrieved 2011-08-09.
- "Lens Compatibility - Nikon D5100". Nikon Corporation. Retrieved 2012-06-10.
- Nikon D60 electronic rangefinder. Digital Photography Review. Retrieved on 7 September 2012.
- John White's AI conversions for Nikon lenses Aiconversions
- "D5100 accessories". Nikon USA. Retrieved 2011-08-08.
- "MC-DC2 Remote Compatibility". Nikon Corporation. Retrieved August 16, 2013.
- PHOTTIX CLEON II Wired and Wireless shutter Phottix
- Solmeta Geotaggers Solmeta
- Dawn di-GPS Products Dawn
- EasyTag GPS and Wireless Bluetooth Modules Easytag
- Foolography Unleashed Bluetooth Geotagging Foolography
- Gisteq PhotoTrackr Plus for Nikon DSLR (Bluetooth) Gisteq
- Phottix Geo One GPS Phottix
- Nikon DSLR GPS Smack Down Results Terrywhite
- Review: Geotagging with Easytag GPS module (Nikon GP-1 compatible) Trick77
- Review: blueSLR Wireless Camera Control & GPS Geotagging Terrywhite
- Battery Packs Phottix
- Product search: Nikon D5100 Battery grip Google
- Eye-Fi Wi-Fi network: how it works Eye-fi
- Flash Units Compatible with Nikon's CLS including Wireless Master Dpanswers
- Radio Triggers for Flash and Camera Dpanswers
- Knight For Nikon Flashgun I-TTL Trigger Pixel
- Radio Transmitters, Receivers and Accessories Pocketwizard
- The Nikon Creative Lighting System: Wireless, Remote, Through-the-Lens Metered (iTTL) Flash! Imaging Resource
- Guide to Nikon TTL Flashes photo.net
- Pixel Knight TR-331 and TR-332 TTL Radio Triggers Dpanswers
- Pixel Knight TR-331 Review Part III Inside the Viewfinder
- Camera Control Pro 2 Nikon
- Aperture 3: Tips on tethered shooting Apple Support
- "Light Room 3 now supports tethered capture for Nikon D7000". Blog GlamourPhotography.co. Retrieved 2011-09-26.
- Choosing Tethered Shooting Software for Nikon DSLR Cameras The Photo Geek
- Tethered Shooting Sofortbild
- DSLR Camera Remote Lite
- D5000 and D5100 Review Links Nikonlinks
- Nikon D5100 review summary Dcviews
- Nikon D5100 Reviews Digitalcameratracker
- Dkamera Image Comparison Nikon D5100 (German)
- "Tests and reviews for the camera Nikon D5100". DxO Labs (needs Flash). Retrieved 2011-04-23.
- Digitutor Nikon D5100 Nikon (needs Flash)
- Nikon D5100 Product Page at Nikon Global
- Nikon D5100 Manual Nikon
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