Multi-CAM 3500FX 51-point AF syste The D4S takes the class-leading accuracy of the D4 and advances it further. The system is configurable in 9-point, 21-point, and 51-point coverage settings and sensitive down to -2 EV (ISO 100, 20 °C/68 °F). Advancements include improved lock-on, expanded ‘store by orientation’, and options for AF mode restrictions.

Group Area AF: Track fast-moving subjects over long distances with phenomenal precision. Group Area AF mode constantly monitors five different AF fields, offering improved acquisition and background isolation when shooting subjects that are comparatively small and close to a high-contrast or distracting background. The five-point AF area can be shifted across the 51-point array as composition demands.

Colour adjustable monitor: Push the colour balance and brightness in any direction to suit your personal workflow preference. The anti-reflective 8.0 cm (3.2-in.), 921k-dot LCD monitor also offers auto brightness control.

Refined ergonomics: Nikon has honed subtle details that make all the difference to handling when shooting on assignment. Changes include improved button layout and re-shaped control buttons to improve operation in damp conditions, as well as re-contoured thumb and middle finger rests and a smoother grip.

Fast durable shutter: When milliseconds matter, the D4S’s 42 ms shutter lag can gain you the critical edge. The Kevlar/carbon fiber–composite shutter unit is tested to 400,000 releases and a shutter speed of 1/8000 to 30 s, with flash synchronization at up to 1/250 s.

Stable viewfinder shooting: A new shutter and mirror mechanism delivers a stable viewfinder image during high-speed shooting. Image shake caused by mirror movement is effectively reduced with minimal viewfinder blackout.

Multi-area D-Movie: For moviemaking in diverse conditions, D-Movie offers broadcast-quality video in multiple frame formats. The D4S records Full HD (1080p) movies in FX and DX formats at 50p/60p frame rates. It offers three sensor crop formats: FX, DX, and native crop (approximately 2.7x) as well as clean HDMI out.

Moviemaking freedo Operational enhancements allow more control over footage while recording. You can set sensitivity and select maximum ISO in M mode, and select the sensor crop format, control power aperture, and fix shutter speed. Nikon’s 3D noise reduction reduces random noise, distortion, and noise flicker when filming at high sensitivities.

HDMI out: The D4S offers uncompressed full-resolution HDMI output to external devices. You can simultaneously record full resolution HD movies in-camera and with an external recorder via HDMI, and an HDMI cable clip is provided with the camera for a secure connection.

High-fidelity audio control: With more options for audio control, the D4S offers improved sound recording. A stereo microphone input and an audio out let you fine tune audio levels in isolation both before and during recording. You can select the sound range (wide/voice), and wind noise can be reduced when recording with the built-in microphone.

3D Colour Matrix Metering III: Offers stable exposure control through the 91k pixel AE sensor. With selectable full-time face recognition function and smoother exposure alteration for improved results when shooting stills, movies, and time-lapse photography.

Spot White Balance metering: Determine White Balance even under challenging mixed lighting conditions. Easily acquire manual, preset White Balance data based on the selected area within the frame: the size of the area acquired can be retained even when the image is enlarged, and consecutive data acquisition is possible.

Picture Controls: The colour rendering and tone curve have been refined for enhanced definition and additional depth in stills and movies. Picture Controls streamline in-camera image processing by enabling customisation of image parameters before capture, as well as complete control over sharpening, contrast, brightness, hue, and saturation in various colour modes.

High-capacity EN-EL18a battery: Ultra-compact and lightweight lithium-ion rechargeable battery with a capacity of 2500 mAh (10.8 V).

Storage media: Two card slots, one for high-speed CF (UDMA 7) cards, and one for high-speed, high-capacity XQD cards.