I have been interested in buying one of these lenses, looking through the photo's from it on this site has convinced me to get one. What I find most interesting is the variety of the photos which show the great beauty of our planet both landscapes and wildlife and the ingenuity of man in the richness of designs of architecture and cityscapes, the photo's here are superb. Keep up the good work guys its very worthwhile looking at shots from places or events that would take many many lifetimes to witness yourself.