Digital Home Thoughts: dpreview Looks at the Canon EOS-1D Mark IV

"However, more than previous 1D series cameras, the 1D Mark IV has a lot to prove. Whereas, in the past, Canon's flagship models have been a fairly safe bet, autofocus problems with the 1D Mark III have cast a shadow over the range. Those problems, which appear to have come from a combination of manufacturing error, increased complexity of AF customization and the AF sensor occasionally being overwhelmed in bright conditions, have become notorious."

If you're a serious Canon shooter, the EOS-1D Mark IV has been on your "want" list since it was announced - this camera has a lot to offer, namely a 16 megapixel sensor with 10 fps shooting, 1080p video, and a huge jump from 19 to 39 cross-type autofocus spots (with an f/2.8 or faster lens mind you). dpreview's exhaustive review is worth a read if you're considering this camera.