The Nikon D800 has an effective pixel count of 36.3 million, claimed to be the highest in the world among commercially available interchangeable lens digital SLR cameras.
The lightweight 1KG camera comes equipped with Nikon's new EXPEED 3 image-processing engine and has a 91K-pixel RGB sensor for image quality.
Nikon has fitted it with the Advanced Recognition System used in the D4, while the D800 can also capture full HD 1080p video. It features a 3.2-inch LCD screen.
The D800 leads the commercial market with its 36-megapixel image capture, but there are already some models available at a higher capacity, such as the 39-megapixel camera launched by specialist Hasselblad in 2006.
The D800 will be released in the UK by the end of March, and is aimed at high-end enthusiasts and professional photographers with an expected price tag of more than £2,000.
Nikon will also release the D800E in April, which disables some of the light filtering in the D800 and is considered "optimal for landscape and artistic photography".
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