D900 follows Nikon’s odd-even naming cycles. These 4 year odd-cycle started with the Nikon D3. What followed was D300, D90, D3000, D700 and D5000 – all non-zero odd numbers. Going with this rationale, Nikon D900 is the next to follow.
Nikon will announce a full-frame camera in PMA 2010. The question is whether it will be a Nikon D800 with an all-Nikon 18 megapixel sensor or a Nikon D900 with a Sony based 24 megapixel sensor.
Nikon D800 will be announced a few days before PMA 2010. It will sport an 18 megapixel full-frame sensor with similar noise characteristics of reputed Nikon D3s