<p>Digital imaging is incredibly complex. This is something we all know but when trying to evaluate a potential purchase most people, specialists & nonspecialists alike naturally tend to want hard facts to work with. There is little doubt that the factors routinely discussed [DR, CD, ISO noise etc] are important when considering a new body and other factors [CA, Distortion etc] regarding a lens are equally important but of course they are not the only data which need to be known. Some people will reject one product for reasons others find irrelevant or even ridiculous. However, given how much time, effort and money many of us devote to photography, we do require a way of deciding whether this or that camera is right for us. Unfortunately, most of the time, this only comes with experience, which is why many of us, having found a company we trust, stick to it. Our ability to overcome the known shortcomings of a product can sometimes be more important than the shortcomings themselves. I sometimes feel rather sorry for review sites. The amount of effort involved in providing a comprehensive review these days is high. And then someone inevitably comes along to point out a 1% difference in measurements between this or that site. It is bewildering.</p>