Mid-September, after a day of shooting, I noticed black spots thru my viewfinder. Changing lens did not help! This led to a quick trip to the Pennsylvania Wildlife Photographer, Willard, who demonstrated how to gently remove the spots. Crisis deverted we settled in to take some shots in his area. Andy placed Willard's Canon 100-400 IS on my camera. Pretty amazing. Quite heavy, but sure made a difference. The next couple images will show how nothing was safe from the Rebel with the BIG lens.