« on: July 10, 2014, 07:09:17 AM »
I bought the 70-200 IS f/4 before the 2.8 II came out, and decided that the f/4 was much the better choice. Against the 2.8 II, the decision would have been much more difficult as it is a fabulous lens wide open, even a tad better at f/2.8 than the f/4 is at f/4. But, you have to stop the old f/2.8 down to f/4 to compete with the smaller lens. I recently posted some photos of the Tour de France in http://www.canonrumors.com/forum/index.php?topic=21705.0 taken with the f/4 on a 5DIII. The images are tack sharp from corner to corner, seen even with the reduced sizes posted.