Excerpt: The D4 is Nikon's new flagship DSLR camera, and represents the highest evolution of Nikon's speed and ISO technology. We go in-depth with the camera to review what's new, and what's been improved, in what is easily one of the best digital cameras in the world today.
Pros: Low noise at ultra-high ISOs, Fast frame-rates for action, Fast and accurate auto-focus, Improved handling and comfortable grip
Cons: ISO performance only slightly cleaner than D3S, XQD card-slot forces users to upgrade
Conclusion: The Nikon D4 is a pro shooter's dream, with controls galore, and a big, bright optical viewfinder. This fully loaded full-frame D-SLR rattles off shots at a quick 10 frames per second, but all of this comes with a rather high sticker price and a steep learning curve.
Pros: Full frame sensor. Every physical control you could ever want. Integrated vertical grip. Shoots at 10 frames per second. Very low image noise. Uncompressed 1080p video output.
Cons: Big and heavy. 16-megapixel resolution. Only one CF card slot.
Summary: Bettering the D3s was always going to be a hard task, but with the D4, Nikon has achieved it. While it may not be as groundbreaking as the original D3, the D4 is a better camera in every way - every element of the D3s appears to have been scrutinised and improved on. This attention to detail and listening to the feedback of photographers has delivered a wonderful DSLR.
Summary: Both the Nikon D3 and D3S were hugely important cameras when released, and for a while they were the pinnacle of professional DSLRs. However, with the resolution of the D3S starting to look a little dated, it was perhaps due an update. The Nikon D4 has indeed updated the resolution, but not by much, and the image quality remains largely the same as its predecessor.