"I had another close look at Jerome's second set, and I have to say I am very surprised. At about 80% of the frame, I am not (or just barely) able to tell the difference between f/2 and f/8. This is an amazing performance. The contrast and resolution at f/2 are simply unbelievable. Stopped down to f/2.8, you can stretch the above comments to around 90% of the frame, leaving out only the extreme corners (for which one can still see continuous improvements even from f/8 to f/11). Hat's off. And thanks again to Jerome for his time and excellent comparisons." http://www.dyxum.com/dforum/topic67991_post773434.html#773434