Calling it the most advanced DX-format digital SLR camera to date, Nikon has unveiled the 12.3 effective megapixel D300, which shares features with the newly introduced D3 digital SLR. Nikon claims a 0.13 second power-up time and a 45 millisecond shutter release lag time for the new camera. Using an image processing system that Nikon calls "EXPEED
