Center-weighted: Weight of 75% given to 12mm circle in center of frame; Matrix: 3D color matrix metering III (type G and D lenses); color matrix metering III (other CPU lenses) ;Spot: Meters 4mm circle (about 1.5% of frame) centered on selected focus point
Auto AF-S/AF-C selection (AF-A), Continuous-servo (AF-C), Face-Priority AF available in Live View only and D-Movie only, Full-time Servo (AF-A) available in Live View only, Manual (M) with electronic rangefinder, Normal area, Single-servo AF (AF-S), Wide area
The Nikon D4 is a 16.2 megapixel professional-grade full frame (35mm) digital single-lens reflex camera (DSLR) announced by Nikon Corporation on 6 January 2012. It succeeded the Nikon D3S and introduced a number of improvements including a 16.2 megapixel sensor, improved auto-focus and metering sensors, and the ability to shoot at an extended ISO speed of 204,800. The camera was released in February 2012 at a recommended retail price of $5999.95. It was also the first camera to utilize the new XQD memory cards.
The Nikon D4 features an ISO setting range from 50 to 204800 which can be selected automatically or adjusted manually, a Nikon Expeed 3 image processor, advanced Multi-CAM3500FX auto-focus sensor (51-point, 15 cross-type), 91,000 pixel RGB metering sensor with Advanced Scene Recognition System and 0.12s start up time and 0.042s shutter release delay. The camera can shoot ten frames per second in continuous FX mode (eleven frames per second with auto-exposure and auto-focus disabled), buffer for 100 RAW or 200 JPEG frames in one burst, image sensor cleaning. Built-in HDR and time, lapse modes, 10/100 base-T Ethernet port for data transfers and tethered shooting. The camera is capable of filming 1080p full HD movie mode at 24 fps worldwide and 25 or 30 depending on region, 720p at 25/50 or 30/60 fps, HDMI HD video output, stereo monitor headphone out, and stereo input (3.5-mm diameter) with manual sound level control. Kevlar/carbon fibre composite shutter with a rating of 400,000 actuations. Live View with either phase detect or improved contrast detect Auto Focus. Virtual horizon indicates in Live View mode, also available during video capture. 'Active D-Lighting' with 6 settings and bracketing (adjusts metering and D-Lighting curve). Fully weather sealed with O-rings
The D4 achieved the fourth-best result in the DXOmark sensor rating, only beaten by two versions of the Nikon D800 and the Phase One IQ180, a medium format, 80 megapixels camera.
The camera received mostly positive reviews, with most reviews mentioning its broad color and ISO ranges. Reviews also mentioned the camera's 10 frames per second shooting ability, with "every frame in-focus and perfectly exposed as your subject moves around."