Three years is a long time in the digital photography industry, a lot has changed since the D100, so treat the table below as a summary of the major changes. The most immediately noticeable however is the build quality, the D200 feels like a professional tool.
The Nikon D200 is a 10.2-megapixel digital single-lens reflex camera that falls between entry-level/midrange DSLR cameras such as the Nikon D40 , Nikon D40x , and D80 and high-end models such as the Nikon D2Hs and D2Xs . It was released by the Nikon Corporation in November 2005. The D200 was succeeded by the D300 in August 2007.