here, here! +1I suppose the only thing MORE worthless than DxOmark's sensor scores, are their lens scores. Absolutely worthless.How can you say that? DXO scores the 50f1.8 higher than the 600f4.0 so it MUST be a better lens........ (Huge sarcasm tag inserted here)
DxO measures the ability of a lens to deliver a quality image. To whit, the 50/1.8 can deliver a higher quality image for than the 600/4.0. Both lenses can be good lenses and deliver exceptional IQ but it is perfectly ok for one lens (even a cheaper lens) to be better than the other for a given purpose.
Just because something is cheap doesn't mean it is bad or low quality, similarly, just because something is expensive doesn't make it high quality.