It's been two years since Nikon's D800 and D800E SLRs hit the scene, and that's just about an eternity for gadget nerds. What exactly has Nikon been doing since then? Well, aside from working on top-tier beauties like the D4 and D4S, it's also been working on a proper successor to the D800 line. Surprise, surprise: it's called the D810, and it's about the sort of leap forward you'd expect from a modest model number jump.
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