Nikon D810

• New 37.09 megapixel (36.3 effective) full-frame (35.9×24 mm) sensor with sensitivity of ISO 64–12,800 (ISO 32–51,200 boost) and no optical low-pass filter (OLPF, anti-aliasing filter)[3]
  • Improved microlenses with increased light gathering
• Nikon Expeed 4 image processor with improved noise reduction, moiré (aliasing) reduction and increased battery life to 1200 shots / 40 minutes video notwithstanding 30% higher speed
  • Roughly doubled buffer size of D800/D800E[4]
  • Frame rate (photo) increased to 5 fps FX (full-frame, DX up to 7 fps). Videos up to 1080p 60p / 50p fps
  • Simultaneous video recording on external recorder (uncompressed video, clean HDMI; up to 1080p60) and compressed on memory card
• Autofocus equivalent to D4S, also Group Area mode: uses five AF sensors together. Face-detection switchable with custom settings
• Highlight-weighted metering preventing blown highlights or underexposed shadows. Also Highlight Display with Zebra Stripes and full aperture metering during live view and video
• Kevlar/carbon fiber composite shutter with reduced lag, vibrations and shutter noise. Redesigned Sequencer / Balancer Mechanism for Quiet and Quiet Continuous modes
  • Electronic front curtain shutter for further reduced vibrations enabling higher resolutions
• OLED viewfinder display
• Timelapse up to 9,999 frames, additionally timelapse videos. Timelapse / Interval Timer Exposure Smoothing
• Customizable 'Picture Control 2.0' options: Flat affecting dynamic range (preserve highlights and shadows), Clarity affecting details. Other settings affecting exposure, white balance, sharpness, brightness, saturation, hue; allowing custom curves to be created, edited, saved, exported and imported
• 3.2" 1229k-dot (RGBW, four dots per pixel: extra white dot) VGA LCD display with "Split-screen display zoom" function
• USB 3.0, HDMI C (mini), Nikon 10-Pin interfaces and 3.5 mm / 1/8″ stereo headphone + 3.5 mm / 1/8″ stereo microphone connectors
• "Superior" resistance to dust and water (Nikon claim)[5]

• Nikon WT-4/WT-4A or WT-5/WT-5A (also UT-1 network) Wireless Transmitter for WLAN. Third-party solutions available.[6]
• Nikon Wireless remote control or third-party solutions.[7]
• Nikon GP-1 or GP-1A GPS Unit for direct GPS geotagging. Third-party solutions partly with three-axis compass, data-logger, bluetooth and support for indoor use are available from Solmeta,[8] Dawn,[9] Easytag,[10] Foolography,[11] Gisteq[12] and Phottix.[13] See comparisons/reviews.[14][15][16]
• Nikon Battery grip or third-party solutions
• Various Nikon Speedlight or third-party flash units.[17] Also working as commander for Nikon Creative Lighting System wireless (slave) flash.

Third-party radio (wireless) flash control triggers

• Tethered shooting with Nikon Camera Control Pro 2, third-party solutions or open-source software and apps
• Other accessories from Nikon and third parties, including protective cases and bags, eyepiece adapters and correction lenses, and underwater housings.
• Nikon D810 animator's kit[18] including the AF-S VR Micro-NIKKOR 105mm f/2.8G, Dragonframe 3.5 software, power supply and cables
• Nikon D810 DSLR Filmmaker's Kit[19] including three fast prime lenses, a portable HDMI recorder using "Pro" codecs,[20] but not capable for storing uncompressed video,[21] ME-1 Stereo Microphone, filters, batteries and cables

External media
Images
Nikon D810 sample, review and user images, >20MPix. Google Image search
Nikon D810 images >22MPix at Flickr
Video
Nikon D810 sample, review and user videos

At the time of its release, the Nikon D810 became the Dxomark image sensor leader[22] ahead of the Nikon D800E and received many reviews.[23][24]

On August 19, 2014, Nikon acknowledged a problem reported by some users, of bright spots appearing in long-exposure photographs, as well as "in some images captured at an Image area setting of 1.2× (30×20)."[25][26] Existing owners of D810 cameras were asked to visit a website to determine whether their camera could be affected, on the basis of serial numbers. Repairs would be made by Nikon free of charge.[25][26] If bright spots still appear in images after servicing, Nikon recommends enabling Long exposure NR.[27] Products already serviced have a black dot inside the tripod socket.[27]

An astrophotography variant with a special infrared filter capable of deep red / near infrared and with special software tweaks like long-exposure modes up to 15 minutes, virtual horizon indicator and a special Astro Noise Reduction software was announced February 10, 2015.[28][29] The D810A's IR filter is optimized for H-alpha (Hα) red tones, resulting in four times greater sensitivity to the 656 nm wavelength than the D810.[30] In comparison, Canon's astrophotography DSLRs 20Da and 60Da Hα sensitivity was 2.5 times and 3 times (respectively) more than the standard 20D / 60D.[31] The D810A additionally has 1.39 stops advantage due to the larger image sensor format – resulting in better than 2 stops sensitivity advantage giving over four times faster exposure times compared to the Canon 20Da/60Da.

External media
Images
Nikon D810A sample, review and user images, >20MPix. Google Image search
Nikon D810A images >22MPix at Flickr
Video
Nikon D810A sample, review and user videos

Although the D810A can be used for normal photography, due to the deep red / near infrared sensitivity the in-camera white balance may fail in case of fluorescent light or difficult cases with very strong infrared light – requiring an external infrared filter. Nikon published an D810A astrophotography guide that recommends live view focusing with 23× enlarged selected areas[32] and a gallery showing the mostly small effects to the color reproduction in "normal" photos.[33]

A review concludes that especially the D810A long exposure noise is superior compared to the D800E and other Nikon fullframes, and shows effects of the increased H-alpha sensitivity. Color balance of "normal" photos seems mostly correct, except comparatively hotter objects with strong infrared radiation and a bit more purple in sunsets.[34]

Wikimedia Commons has media related to Nikon D810, Taken with Nikon D810 and Taken with Nikon D810A.

• Nikon D810, Nikon USA
• Nikon D810A, Nikon USA
• Nikon D810 - D800/D800E Comparison Sheet Nikon
• D810-D810A Comparison Sheet Nikon
• Nikon D810 User Manuals, Guides and Software Nikon Download-center
• Nikon D810A User Manuals, Guides and Software Nikon Download-center
• Nikon D810 Review Imaging Resource
• Best camera for astrophotography? Nikon D810A review, Skies & Scopes