Originally posted by Clavius LOL!
Do you think they use different lens testing procedures between their scoring and their image processing software? Now that would be something...
I think they use the same information, but, use it inappropriately, basing their whole system on low light performance, creating scores artificially weighted for camera and lenses that perform well in low light. It would be quite possible to also create a commercial light system, a daylight system, systems for all lighting conditions, and different ƒ-stops that would tell the whole story, and to my way of thinking those categories would each stand on their own, not be mixed into some mysterious number.
Sure I want to know what the best system is for low light ,but I won't buy a camera based on that, I want to know what the best results from the strongest parts of the system are like. When I use the Photozone rating I can look at a lens like the 18-135 and say well, I can see why it's rated so low in the grand scheme of things, but I can also see, that this is a great lens for the light I shoot in and the way I shoot. Klaus rates it a 1.5 , I rate it a 3.5, but I can do that, because I have the raw data, and I can tailor the interpretation of the data to my own needs. And what I look at is "what is the best this lens can give me." DxO doesn't give me enough to know what I'm getting, and offers me no ability to draw my own conclusions based on my own shooting style. In fact they use a rating system that is drawn from images that would represent less than .1% of my images based on my current use.