I know there will be a lot of people that don't find this interesting but for the ones that are thinking about a new zoom lens, this is for you. (And for Paul since he was playing with his zoom lenses!)
Just out of curiosity one day I took a photo of a woman sitting on the beach reading a book. I had a Nikon 1.4 teleconverter on the 200-500mm f5.6 lens so this first shot is at 280mm and I was about 100 feet away.
I took the second shot at 700mm and cropped it 50% just to see if I could make out any of the words.
Needless to say, I was impressed with the results! Even with a teleconverter I can zoom in on this photo and read the words on the page without any problem.
If you are thinking about one of these lenses you won't be disappointed.