When Canon announced the outlandish 1DX, you could be sure Nikon wouldn't be too far behind. Now, specs of the new D4 are leaking, and it looks like it could be a close fight between the two.
According to Nikon Rumors, the hotly anticipated pro-level D4 will feature a 16.2-megapixel sensor, an 11fps burst mode, and a native ISO range of between 100 and 102,400. There's also an expansion option that can allow ISO 204,800, which should—in theory—mean super-clean pictures at ISO 12,800. Let's wait and see.
Elsewhere, the D4 will also have an integrated Ethernet port and be compatible with the new CompactFlash XQD memory cards. There are also a bunch of unspecified tweaks to the 51-point autofocus array and, perhaps more importantly, improvements to video capture. Video has long been Nikon's weak point, so it will be interesting to see if these tweaks put those difficulties to rest.
If all this isn't enough to satisfy your urges, you can read the full run-down at Nikon Rumours. All in, it sounds like a pretty exciting package, and if these specs don't change much before launch, we could see an interesting scrap between the D4 and the 1DX next summer. [Nikon Rumours]