On Sunday, March 27, 2005, at 08:09 PM, Richard Knoppow wrote: > To > characterise a lens MTF completely the test must be run at > several image angles and at a variety of stops for each > angle. > Our friends at LZOS in Lytkarina, Russia, make what looks like a really nice MTF testing bench, should anyone want to make the investment: http://www.lzos.ru/en/mtf.htm I don't see the price in their list, but since their other prices are so competitive I'm sure this one is as well. Bob