Nikon D4

       Like its predecessor, the Nikon D4 looks as if it’s going to be an incredibly impressive camera. Nikon has looked to its professional user-base and tried to work out what it needed to add or adjust on a camera that just a couple of years ago represented the best they were capable of. The result is a camera with few big changes but a extensive series of small improvements.

       The biggest change is, of course, the improvement in video capabilities. Given the increasing demand for video footage from professional photographers, and the incredible success of Canon’s 5D Mark II in the professional video market, it was inevitable that Nikon’s pro flagship would need to offer a more compelling feature set than the existing models.

      Beyond this, the changes to the stills-shooting specifications are relatively modest – there’s a higher-resolution, 16.2MP, full-frame CMOS sensor and the ability to shoot at 10 frames per second with autofocus, but that’s about it. The new chip's capability has prompted Nikon to offer an ISO range from 100-12,800 that can then be extended to 50 – 204,800 (Hi4). The significant changes, beyond video, are a profusion of smaller tweaks, additions and improvements to what was already a well worked-out camera. These include a carbon fiber shutter rated to 400,000 actuations that can fire at up to 1/8000th of a second.

       The biggest technical changes are the addition of a 91,000 pixel ‘metering’ sensor, replacing the 1005 pixel example used up until now. This sensor is used for much more than just metering, playing a key role in subject tracking, white balance and 'Active D-lighting' (a trick Canon seems impressed with, given the appearance of a similar system in the 1DX). The higher-resolution sensor allows the camera to offer face detection when shooting through the optical viewfinder.

Specifications
Lens Mount	Nikon F bayonet mount
Effective Pixels	16.2 million
Sensor Size	36.0mm x 23.9mm
Image Sensor Format	FX
Image Sensor Type	CMOS
Total Pixels	16.6 million
Dust-reduction system	Image sensor cleaning Image Dust Off reference data (optional Capture NX 2 software required)
Dust-Off Reference Photo	Yes
Image Area (pixels)	FX-format (L) 4.928 × 3,280 (M) 3,696 × 2,456 (S) 2,464 × 1,640 1:2 format (30 x 20) (L) 4,096 × 2,720 (M) 3,072 × 2,040 (S) 2,048 × 1,360 5:4 format (30 x 24) (L) 4,096 × 3,280 (M) 3,072 × 2,456 (S) 2,048 × 1,640 DX-format (L) 3,200 × 2,128 (M) 2,400 × 1,592 (S) 1,600 × 1,064
File Format Still Images	JPEG: JPEG-Baseline Compliant; can be selected from Size Priority and Optimal Quality 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 TIFF (RGB)
Picture Control	Landscape Monochrome Neutral Portrait Standard User-customizable Settings Vivid
Storage Media	CompactFlash© (CF) (Type I, compliant with UDMA) XQD Type Memory
Card Slot	1 CompactFlash© (CF) card and 1 XQD memory type card
File System	Compliant with DCF (Design Rule for Camera File System) 2.0 DPOF (Digital Print Order Format) EXIF 2.3 (Exchangeable Image File Format for Digital Still Cameras) PictBridge
Viewfinder	Eye-level Pentaprism Single-Lens Reflex Viewfinder
Viewfinder Frame Coverage	FX (36x24): 100% Horizontal and 100% Vertical Approx. 1.2x (30x20): 97% Horizontal and 97% Vertical Approx. DX (24x16): 97% Horizontal and 97% Vertical Approx. 5:4 (30x24): 97% horizontal and 100% vertical Approx.
Viewfinder Magnification	0.70x Approx.
Viewfinder Eyepoint	18mm (-1.0m¯¹)
Viewfinder Diopter Adjustment	Built-in diopter adjustment (-3 to +1 m¯¹)
Focusing Screen	Type B BriteView Clear Matte Mark VIII with AF Area Brackets (grid lines can be displayed)
Reflex Mirror	Quick-return type
Lens Aperture	Instant-return type
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