I am having some issues with my 60D and I'm hoping someone can help. Completely out of the blue, when I attach a wider-angle lens, looking through the viewfinder is like looking through a paper towel tube. Small circle in the center, sides blacked out. When I use a longer lens, there is a black shadow box around the edges of the frame in the viewfinder. I can snap a photo, and it is a full, clear frame - no shadows or black out. The shadows and "tunnel" vision throw off the auto-focus and tries to set off the auto-flash. Nothing seems to be out of order that I can see and nothing has happened to the camera, such as a drop or distress. Any help is greatly appreciated!