The Nikon D4S has been teased, displayed in a plastic case and now, it’s official — and we even got to play with it. There’s a substantial list of what hasn’t changed (the same 16.2-megapixel image size, to begin with), but if you’re a high-level photographer already in possession of a D4 (or perhaps even a D3S), you’ll be more interested in those differences. Firstly, while the sensor will offer the same sized images, but it’s a newly developed piece of hardware, with a focus on better noise reduction. ISO now ranges from 100 – 25600, with its Hi4 setting cranking that up to a mind-boggling 409600. If you’re currently handling a D4, you can also expect to see substantial noise reduction: the D4S’ ISO 1600 will be comparable to the D4’s ISO 800 setting.
Nikon’s new DSLR also delivers changes to to the auto-focus system for both photos and video. Behind the lens, there’s improvements to both the tracking system and the algorithms that govern how the D4S focuses. A new Group AF mode tracks five separate points, meaning that a moving subject (and even a moving photographer) should pose less of a threat to crisp imaging. On video, (where you can now capture uncompressed 1080p resolution at 60 frames) tracking has been bumped up to 11 frames per second on full auto-focus and exposure.