Just bought the Sigma 18-200 OS (Canon fit). Here's some shot's. Boat - 200mm Ex Red Arrow Gnat XR537. Fully restored & going through engine & air tests Here is more info. Airport View - 18mm Hardy Country. 1st Plane Sunset 2nd Plane Sunset 3rd Plane Sunset... Phew, Just made it. After a couple of Days with it I quite like it. It's not as fast as my Canon 70-300 IS but the range & sharpness is good.