109% -- Canon 1D Mark III & EF 200mm f1.8L & 1.4X Teleconverter
Another picture from the OFSAA Swim Championship 2012. I couldn't take pictures of the swimmers, therefore most of the pictures I took that day were of people standing close to the glass wall where the spectators sat.
Not sure if the glass wall has something to do with picture quality, but I now find that the pictures I took were quite a bit less sharp with the 1.4x teleconverter than the usual very sharp wide open performance of the 200mm f1.8L. It's very usable, no question, but definitely not as good as the naked lens is.