I currently have the Canon EOS Rebel T2i with both the 18-55mm and the 55-250mm lenses. I was at an air show last weekend and found the limitations of the 55-250mm lens. My daughter and I are going to Europe next summer for three weeks and I would like to have a bigger telephoto. Can you recommend one that is fully compatible with the T2i that won't break the bank? Does something like this exist? Also, what about under the 18-55mm lens? What are my options there?