I photographed this large wheel handheld at ISO 1600. I had to learn that high ISO settings in digital SLR cameras treat noise different that conventional cameras deal with grain. In the beginning I always tried to use the lowest ISO that was possible. Now I am more courageous and try to shoot with higher ISO setting at least once in a while. Since the wheel was moving a longer exposure time would have blurred the image which I did not want in this shot.
Happy Friday and enjoy your photography with lots of fun and enthusiasm.