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Nikon D800 36.3 MP CMOS FX-Format Digital SLR Camera Review The most obvious difference from the perspective of core functionality are a massive increase in resolution, from 12 to 36MP, which comes with a significant boost in processing power, and the addition of video mode. The D800's video mode is lifted almost completely from the professional D4 and boasts 1080p30 resolution with the option to output uncompressed footage via HDMI.