Originally posted by MJSfoto1956 love 'em or hate em, one thing that is unmistakeable is that DxO testing does reveal TRENDS and data mining their published data can really help you to learn how your particular lens + body combination behaves as a system and how different f-stops change the behavior of the system. Viewed that way, what they have done is a real service.
Or you could take pictures and finds out how changing the f-stops affects the system, like with your camera and your lenses. I don't think DxO publishes anything that saves you any time on the road to learning your own camera gear, but it's an interesting diversion down the road of "related information" if you choose to go that way.
Given that the lenses I've read all test worse on Pentax equipment than on there brands, in the few instances when the same lens is rated on two systems, the most logical conclusion would be don't buy Pentax. You'll get better performance with the same lens on another system.
There is one lens where the same Sigma or Tamron lens is rated for both the k-5 and D7000. The K-5 is rated a slightly better body, the lens is rated lower on the Pentax than on the D7000. DxO's data is not internally consistent. Until it is, it's like reading a historical novel, the facts are real, but the story line is made up. The story line being their ratings and commentary.