The Nikon D4s has now been officially announced: With a 16MP sensor, ISO 409,600, RAW S (small) and a price tag of £4,500 (£300 more than the D4; see D4s vs. D4 specs comparison).

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Nikon D4s highlights:

16.2MP FX-Format CMOS Sensor
EXPEED 4 Image Processor
3.2″ LCD Monitor
Full HD 1080p Video Recording at 60 fps
Multi-CAM 3500FX 51-Point AF Sensor
Native ISO 25600, Extended to ISO 409600
11 fps Shooting for 200 Shots with AE/AF
91k-Pixel RGB Sensor and Group Area AF
14-Bit RAW Files and 12-Bit RAW S Format
1000 Base-T Gigabit Wired LAN Support

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Nikon D4s camera:
The evolution of a masterpiece.

The course of modern imaging has been forged by the talent and ingenuity of working professionals, but also by the introduction of a few cameras so innovative and forward-thinking, they redefined what’s possible. The Nikon D4 has been such a camera. And now D4S proves that a great thing really can get better, with remarkable enhancements throughout the entire workflow, dazzling new levels of speed, performance, ISO sensitivity and, of course, the superior image quality of a Nikon camera.

Nikon D4s performance:

Speed and performance.

How do you make a revolutionary camera better? Improve its speed, precision and efficiency without sacrificing the features that make it exceptional. D4S builds on the success of D4 with 30% faster image processing and substantial energy savings—capture up to 3,020* stills on a single charge—an extended standard ISO range (100-25,600) with enhanced noise reduction, and improved tonal range and smoother gradations. Shoot 11 fps for approx. 200 shots at full resolution with AE and AF functionality. For faster initial subject capture, use five AF sensors as a single focus point with the new Group Area AF setting. Transfer files 10x faster than the D4 with new 1000 Base-T (Gigabit) wired LAN, and increase that speed further by shooting a new smaller RAW SIZE S format. Perform at your peak—D4S will keep up.

*Based on CIPA Guidelines