For its first full-frame digital SLR, Nikon took a balanced approach with a camera that offered excellent overall performance, but didn't significantly raise the bar in resolution. With the D3X, Nikon has made its mark on the high-res full-frame market with 24.5-megapixel resolution -- tying with Sony's flagship Alpha DSLR-A900. (While Sony lists the A900 as having 24.6 megapixels, the final image size is identical to that of Nikon's D3X -- the slight 0.1 megapixel discrepancy coming down to a difference in how the two companies count effective megapixels.) With identical resolution, the difference between these two heavyweights will come down to the remaining feature set of each camera. Meanwhile, in quite a turn of events, Nikon's tradition rival, Canon, is left lagging a fair way behind resolution-wise with its flagship EOS-1Ds Mark III still sitting on 21.1 megapixels