Click on "next" to see my first shot with this on the camera.
Also works on Rebel and I suspect the 10D. One caveat: The viewfinder focus adjustment is very loose (others have reported this as well) and it is easy to throw out of adjustment if you rest your eye on the rubber eyepiece. Very simple to attach. Just slip up the rubber cover plastic frame around the eyepiece and slide the Anglefinder down in its place.