Although in terms of size and weight the D80 is closer to the D50, in terms of specification, 
performance and overall feel it is closer to the D200, something that will be welcomed by enthusiasts. Without its lens or battery the D80 weighs in at a chunky 585g, 30g more than the Sony A100, 75g more than the Canon 400D and a massive 210g heavier than the Olympus E-400. However the weight is well balanced and the camera feels reassuringly solid and steady. Measuring 132 x 103 x 77mm the body is just a few millimetres larger than the D50. It has a plastic shell over what is presumably a magnesium alloy or aluminium frame, and as one might expect at this price level the build quality is superb.
The battery hatch is metal, the card hatch has metal hinges and spring, and the connection ports and remote control connector are covered by tight-fitting dust proof rubber plugs. While the D80 lacks the environmental seals of the D200 or the Pentax K10D, it is certainly tough enough to survive professional use outdoors. TrustedReviews - Nikon D80 10MP Digital SLR