Nikon today launched its long-anticipated D3X as its new flagship digital SLR. As slipped by the company ahead of time, the new pro camera roughly doubles the sensor density to 24.5 megapixels and produces a native 6048x4032 picture -- enough to rival a medium-format camera in a handheld format, the company claims. The camera also adds 16-bit color processing for further image accuracy improveme
