Nikon's highest resolution sensor is housed in the D810, and by omitting the Optical Low Pass Filter, the sensor provides superior sharpness and detail. The sensor boasts fast channel readout, wide dynamic range, rich tones and improved imaging at high sensitivities.

The EXPEED 4 processor provides 30% faster performance over the EXPEED 3 as well improved low noise imaging throughout the ISO range. Support for 1080p video capture at 60 fps is featured and the processor's increased efficiency enables up to 1200 still shots and 40 minutes of video recording per charge.

The improved ISO range compared to the D800 enables more effective low light imaging, and the ISO can be expanded from 32 to 51,200.

Versatile AF Modes of 9, 21, and 51 points and 3D tracking enable fast, precise auto focus control. AF sensitivity down to -2 EV is effective in low light and 15 cross-type sensors are compatible with AF NIKKOR lenses with open aperture of f/5.6 or faster. Eleven central focus points work with an open aperture of f/8. Improvements include upgraded 'lock-on', expanded 'store by orientation,' and more options for AF mode restrictions.

Group Area AF enhances subject detection and tracking in challenging lighting conditions or when shooting comparatively small subjects against a high-contrast background by grouping and monitoring 5 individual AF points. The 5-point AF area can be shifted across the 51-point array as your composition changes.

Accelerate your workflow with Nikon's RAW Size S file format which delivers 12-bit uncompressed Nikon NEF files that enable faster image transfer and smoother post-production.

In FX mode, the D810 can shoot up to 5 fps, and in DX mode it can capture up to 7 fps when utilizing the MB-D12 battery grip with AA batteries.

The D810's shutter/mirror box architecture and electronic front-curtain feature improve overall image clarity. The shutter/mirror mechanism reduces image shake for a steady viewfinder image with minimal blackout during high-speed shooting. When activated, the electronic front-curtain shutter reduces the risk of blur in even subtle details by minimizing internal vibrations during exposure.

A redesigned Sequencer/Balancer Mechanism enables Quiet Continuous Mode for near silent sequential shooting.

In addition to standard, neutral, vivid, monochrome, portrait and landscape, image control options have been expanded to include Flat Picture Control which is geared for shooting in RAW modes and for video capture when adjustments will be made in post-production. Also, a clarity option has been added to all Picture Control settings and better control over Picture Control is enabled by fine 0.25 steps.

Video recording is supported in both FX and DX formats with an ISO range from 64 to 12,800 and expandable to 51, 200. Simultaneous recording to memory cards and to an external recorder is now supported. Auto ISO adjustment is possible in manual mode for smooth exposure transitions. Nikon's 3D noise reduction reduces random noise, distortion, and flicker when filming at high sensitivities. Zebra mode on the camera monitor shows you exactly where highlights are. A built-in stereo microphone as well as jacks for external microphone and headphones are provided. You can fine-tune audio levels in isolation both before and during recording and select the sound range (wide/voice).

A high resolution LCD provides detailed playback viewing and live view capture with color balance and brightness control. A split screen display zoom for still shooting lets you compare two enlarged points in the image for sharpness and exposure.

Improved coatings on the optical components render brighter and more accurate color, and the Organic EL information display makes it easier to make adjustments under bright/dim conditions.

Exposure smoothing is supported in time-lapse and interval shooting modes and the number of recordable images has been increased to 9,999.

Both a built-in flash and hot shoe mount are supported with i-TTL metering, as is a flash sync terminal. The built-in flash offers commander mode for wireless control of up to two groups of off-camera flash units.

Two card slots are supported for versatile image storage and smoother workflow. One CF card slot for high-speed UDMA 7 cards, and one SD card slot for high-speed, high-capacity SDXC and UHS-I cards allow you to use one card as back-up or place still images on one card and video on the other or RAW on one and JPEG on the other.

The D810 offers wireless connectivity for image transfer to a computer or FTP server and for remote camera control using Nikon's Camera Control Pro 2 software via the optional WT-5A Wireless Transmitter in combination with the optional UT-1 Communications Unit. The WT-5 attaches to the UT-1 unit which mounts to the camera's accessory hot shoe.

A deeper hand grip improves handling, and a secondary "i" button has been added for easier access to important settings. A durable magnesium alloy body with extensive weather and dust sealing ensure the D810 is moisture- and dust-resistant.