Pre-Photokina: After a steady trickle of leaks and rumors Nikon has announced the successor to its popular D80 middleweight digital SLR in the shape of the D90. The D90 looks very similar, but underneath it's a completely new camera that's inherited advanced features from further up the line and user-friendly features from the D40/D60 range. Oh, and it's the world's first digital SLR with a movie mode. Oher features of note include a new 12.3 MP CMOS sensor, the D3/D300/D700's fab high resolution 3.0-inch screen and continuous shooting at up to 4.5 frames per second. We've had a D90 for a few days now, just enough time to produce a detailed hands-on preview.