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Don't forget the Sigma SD14. I just got one and I have to say that it was worth it. I traded a perfectly good, almost new 400d with the 17-70 IS and 60mm Macro lenses. I think the IMAGE QUALITY is very much superior to anything using the Bayer system. While it might not have ell the "bells and whistles" it is a damned site easier to operate. It took me about 15 minutes to learn how to use it. Many other cameras are so complex that it defeats the purpose of taking photos. At ISO 50 I think the images rival the 5d and certainly the old Kodachrome 25. Compared to others, it may have some perceived shortcomings. The camera does not pretend to be all things for all people. Sigma does have a few dud lenses. But so do the other brands. I had a 17-40 Canon that never seemed as sharp as the Sigma 17-70. The camera is best used for portraits, landscapes, fine art, industrial, and advertising photography. It is more for the ılow foodıpeople out there. Just think of it as somethin...