I would have tacked this onto the thread lower down, but the results in the test are so shocking I thought a new thread was merited. The direct resolution comparisons with a Nikon D200 were what really took me aback. It must be said that a completely greyscale target is the worst case scenario for the Foveon sensor, whislt being simultaneously the best case scenario for a Bayer sensor, but nevertheless I would not have expected to see images so dire coming from the Sigma. At worst I would expect maybe a 30% or so reduction in linear resolution for the Sigma, and probably rather less than that, because of its not having an anti-aliasing filter. But the images shown suggested something far, far worse. I suspect Angela will be having to field a few concerned questions from potential Sigma buyers, about whether anything other than the sensors might have been responsible for the Sigma's poor showing.